2000 GMC C3500 HD Oil Type & Capacity
The 2000 GMC C3500 HD oil type depends on the engine: the 6.5 F, Automatic takes 15W-40 (8.0 quarts with filter); the 6.5 F, Standard takes 15W-40 (8.0 quarts with filter); the 7.4 J, Automatic takes 5W-30 (7.0 quarts with filter); the 7.4 J, Standard takes 5W-30 (7.0 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- 6.5 F, Automatic: 15W-40, 8.0 quarts with filter
- 6.5 F, Standard: 15W-40, 8.0 quarts with filter
- 7.4 J, Automatic: 5W-30, 7.0 quarts with filter
- 7.4 J, Standard: 5W-30, 7.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 6.5 F, Automatic — 6.5L Eng | API - CH-4/CG-4, SAE 15W-40 | 8.00 QTS. | — | SAE 15W-40 is best for your vehicle. However, you can use SAE 10W-30 if it's going to be colder than (0°C) 32°F before your next oil change. When it's very cold, below (-18°C) 0°F, you should use SAE 10W-30 to improve cold starting. SAE 30 may be used at temperatures above freezing, (0°C) 32°F. These numbers on the oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 6.5 F, Standard — 6.5L Eng | API - CH-4/CG-4, SAE 15W-40 | 8.00 QTS. | — | SAE 15W-40 is best for your vehicle. However, you can use SAE 10W-30 if it's going to be colder than (0°C) 32°F before your next oil change. When it's very cold, below (-18°C) 0°F, you should use SAE 10W-30 to improve cold starting. SAE 30 may be used at temperatures above freezing, (0°C) 32°F. These numbers on the oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 7.4 J, Automatic — 7.4L Eng | API - SAE 5W-30 | 7.00 QTS. | — | SAE 5W-30 is best for your vehicle. However, use 10W-30 if the outside temperature is higher than 18Deg.C (0Deg.F). Do not use other viscosity oils, such as SAE 20W-50. If your vehicle is operated in an area where the temperature falls below -29Deg.C (-20Deg.F), consider using a SAE 0W-40 oil, it will provide easier cold starting and better protection for the engine at extremely low temperatures. |
| 7.4 J, Standard — 7.4L Eng | API - SAE 5W-30 | 7.00 QTS. | — | SAE 5W-30 is best for your vehicle. However, use 10W-30 if the outside temperature is higher than 18Deg.C (0Deg.F). Do not use other viscosity oils, such as SAE 20W-50. If your vehicle is operated in an area where the temperature falls below -29Deg.C (-20Deg.F), consider using a SAE 0W-40 oil, it will provide easier cold starting and better protection for the engine at extremely low temperatures. |
Buy the right oil
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More specs & repair guides for your C3500 HD
2000 GMC C3500 HD factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
25.0 quarts (23.65 L) — 50/50 mixture of DEX-COOL and clean, drinkable water
Frequently asked questions
What type of oil does a 2000 GMC C3500 HD take?
It depends on the engine: 6.5 F, Automatic uses 15W-40; 6.5 F, Standard uses 15W-40; 7.4 J, Automatic uses 5W-30; 7.4 J, Standard uses 5W-30.
How much oil does a 2000 GMC C3500 HD take?
Capacity depends on the engine: 6.5 F, Automatic holds 8.0 quarts with filter; 6.5 F, Standard holds 8.0 quarts with filter; 7.4 J, Automatic holds 7.0 quarts with filter; 7.4 J, Standard holds 7.0 quarts with filter.
Can I use synthetic oil in my 2000 GMC C3500 HD?
Yes. 15W-40 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2000 GMC C3500 HD. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.