2020 GMC Sierra 2500 HD Oil Type & Capacity

The 2020 GMC Sierra 2500 HD oil type depends on the engine: the 6.6L takes 15W-40 (10.0 quarts qt with filter); the 6.6L takes 5W-30 (8.0 quarts qt with filter), per the factory service manual.

Factory-spec answer

It depends on the engine:

6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 5W-30, 8.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter
6.6L: 15W-40, 10.0 quarts with filter

Oil capacity by engine

Engine	Oil Type (viscosity)	Capacity w/ Filter	Capacity w/o Filter	Notes
6.6L — AT4, 6.6L Eng VIN Y, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 2D Pickup, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — AT4, 6.6L Eng VIN 7, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — Base, 2D Pickup, 6.6L Eng VIN 7, 4WD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — Base, 2D Pickup, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 2D Pickup, 6.6L Eng VIN Y, 4WD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Crew Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Crew Cab, 6.6L Eng VIN Y, 4WD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Crew Cab, 6.6L Eng VIN 7, 4WD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — Base, 4D Pickup Extra Cab, 6.6L Eng VIN Y, 4WD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Extra Cab, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — Base, 2D Pickup, 6.6L Eng VIN Y, 4WD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 2D Pickup, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN 7, 4WD, Automatic T/Case Control, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — Base, 4D Pickup Crew Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Extra Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Crew Cab, 6.6L Eng VIN Y, 4WD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Extra Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Base, 4D Pickup Crew Cab, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — Base, 4D Pickup Extra Cab, 6.6L Eng VIN Y, 4WD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Denali, 6.6L Eng VIN Y, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — Denali, 6.6L Eng VIN 7, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — Base, 4D Pickup Extra Cab, 6.6L Eng VIN 7, 4WD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN Y, 4WD, Automatic T/Case Control, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN Y, 4WD, Automatic T/Case Control, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN Y, 4WD, Part Time T/Case Control, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN 7, 4WD, Automatic T/Case Control, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN Y, 4WD, Part Time T/Case Control, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN 7, 4WD, Part Time T/Case Control, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN 7, 4WD, Part Time T/Case Control, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN Y, 4WD, Automatic T/Case Control, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN Y, 4WD, Part Time T/Case Control, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN Y, 4WD, Part Time T/Case Control, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN Y, 4WD, Automatic T/Case Control, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 2D Pickup, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN Y, 4WD, Part Time T/Case Control, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN 7, 4WD, Part Time T/Case Control, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLT, 4D Pickup Extra Cab, 6.6L Eng VIN Y, 4WD, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN Y, 4WD, Automatic T/Case Control, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN Y, 4WD, Automatic T/Case Control, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Crew Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN 7, 4WD, Automatic T/Case Control, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLT, 4D Pickup Crew Cab, 6.6L Eng VIN 7, 4WD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLT, 4D Pickup Extra Cab, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLT, 4D Pickup Extra Cab, 6.6L Eng VIN 7, 4WD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLT, 4D Pickup Crew Cab, 6.6L Eng VIN Y, 4WD, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN Y, 4WD, Part Time T/Case Control, Trans Mfr CD 10L1000/MGM, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLT, 4D Pickup Extra Cab, 6.6L Eng VIN Y, RWD, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLT, 4D Pickup Crew Cab, 6.6L Eng VIN 7, RWD, Gas	API - SAE 5W-30 Dexos	8.00 QTS.	7.50 QTS.	Cold Temperature Operation: In an area of extreme cold, where the temperature falls below -29Deg. C (-20Deg. F), an SAE 0W-30 oil should be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. When selecting an oil of the appropriate viscosity grade, be sure to always select an oil that meets the required specification, dexos.
6.6L — SLE, 4D Pickup Extra Cab, 6.6L Eng VIN Y, RWD, Trans Mfr CD 10L1000/MGU, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.
6.6L — SLT, 4D Pickup Crew Cab, 6.6L Eng VIN Y, RWD, Diesel	API - SAE 15W-40	10.00 QTS.	9.20 QTS.	Oils designated as API CJ-4 or CK-4 are required for the vehicle. The CJ-4 or CK-4 designation can appear either alone or in combination with other American Petroleum Institute (API) designations, such as API CJ-4/SL. These letters show API levels of quality. When it is very cold, below 0Deg. F (-18Deg.C), you should use SAE 5W-40 to improve cold starting. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50.

📦 DIY Oil Change Kit Builder

Complete Oil Change Bundle for 2020 GMC Sierra 2500 HD

Everything you need delivered in one order. Pre-matched to your factory spec (15W-40, 10.0 quarts).

Preferred Oil Brand:

Mobil 1 15W-40 Full Synthetic OilExact Spec

Heavy-Duty Case Pack / 3 Gallons (10.0 quarts needed)

$69.99Item Link ↗

2020 GMC Sierra 2500 HD Premium Synthetic Oil FilterExact Fit

OEM-fitment high-efficiency synthetic filter media (6.6L)

$11.99Item Link ↗

Oil Drain Plug Crush Washer Gaskets (5-Pack)Recommended

Direct-fit replacement seal — prevents oil leaks after tightening

$6.99Item Link ↗

15-Quart Low-Profile Drain Pan with Pour SpoutTool

Catch-all basin with anti-splash lip & secure transport cap

$18.99Item Link ↗

RhinoRamps 12,000 lb Drive-Up Vehicle RampsTool

Safe driveway clearance for quick vehicle underbody access

$49.99Item Link ↗

Heavy-Duty Black Nitrile Gloves (Box of 100)PPE

6-mil commercial-grade chemical & oil resistant mechanics gloves

$14.99Item Link ↗

Multi-Angle Spill-Proof Oil Funnel SetTool

Wide-mouth funnel with flexible neck to eliminate engine bay spills

$8.99Item Link ↗

Scott Blue Shop Towels (6-Pack)Supplies

Ultra-absorbent lint-free automotive towels for clean-up

$12.99Item Link ↗

Selected Items: 3 items

$88.97 est. total

🛒Buy Complete DIY Kit on Amazon (~$88.97) →

As an Amazon Associate we earn from qualifying purchases. Prices shown are real-time retail estimates.

Buy the right oil & filter for your Sierra 2500 HD

🛒 Buy 15W-40 Full Synthetic Oil (10.0 quarts needed) on Amazon 🛒 Buy 5W-30 Full Synthetic Oil (10.0 quarts needed) on Amazon

💡 Capacity Note: Your 2020 GMC Sierra 2500 HD holds 10.0 quarts with filter. Since standard jugs are 5 quarts, be sure to pick up extra 1-quart bottles or a 2-pack to reach the full mark on the dipstick.

Popular Full Synthetic Brands (15W-40):

Mobil 1 →Valvoline Advanced →Pennzoil Platinum →Castrol EDGE →

🔧 2020 GMC Sierra 2500 HD Oil Filter on Amazon Drain plug crush washer on Amazon

+ 15 Qt Drain Pan + Shop Towels (6 pack)+ Nitrile Gloves (100 pk)

As an Amazon Associate we earn from qualifying purchases made through these links.

More factory specs & repair guides for your Sierra 2500 HD

🛞 2020 GMC Sierra 2500 HD Tire Size & Pressure →🌧️ 2020 GMC Sierra 2500 HD Wiper Blade Sizes →💡 2020 GMC Sierra 2500 HD Light Bulb Sizes →📖 2020 GMC Sierra 2500 HD Factory Service Manual →All fluid capacities (transmission, coolant, brakes)

Coolant capacity

30.7 quarts (29.05 L) — 50/50 mixture of DEX-COOL and clean, drinkable water. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling.

Frequently asked questions

What type of oil does a 2020 GMC Sierra 2500 HD take?

It depends on the engine: 6.6L uses 15W-40; 6.6L uses 5W-30.

What is the oil capacity of a 2020 GMC Sierra 2500 HD?

Oil capacity depends on the engine: 6.6L holds 10.0 quarts with filter; 6.6L holds 8.0 quarts with filter.

How often should I change the oil in my 2020 GMC Sierra 2500 HD?

Most 2020 GMC Sierra 2500 HD owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — GMC recommends intervals based on driving conditions, not just mileage.

Can I use synthetic oil in my 2020 GMC Sierra 2500 HD?

Yes. 15W-40 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2020 GMC Sierra 2500 HD. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.

Other GMC Sierra 2500 HD years

2025 Sierra 2500 HD 2024 Sierra 2500 HD 2023 Sierra 2500 HD 2022 Sierra 2500 HD 2021 Sierra 2500 HD 2019 Sierra 2500 HD 2018 Sierra 2500 HD 2017 Sierra 2500 HD 2016 Sierra 2500 HD 2015 Sierra 2500 HD 2014 Sierra 2500 HD 2013 Sierra 2500 HD