2005 GMC Cab & Chassis Sierra Oil Type & Capacity
The 2005 GMC Cab & Chassis Sierra oil type depends on the engine: the 2D Pickup Extra Cab, 6.0 U, 4WD, Automatic takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Automatic takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Standard takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.0 U, RWD, Automatic takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.0 U, RWD, Standard takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.6 2, 4WD, Automatic takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.6 2, 4WD, Standard takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.6 2, RWD, Automatic takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup Extra Cab, 6.6 2, RWD, Standard takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup Extra Cab, 8.1 G, 4WD, Automatic takes 5W-30 (6.5 quarts qt with filter); the 2D Pickup Extra Cab, 8.1 G, 4WD, Standard takes 5W-30 (6.5 quarts qt with filter); the 2D Pickup Extra Cab, 8.1 G, RWD, Automatic takes 5W-30 (6.5 quarts qt with filter); the 2D Pickup Extra Cab, 8.1 G, RWD, Standard takes 5W-30 (6.5 quarts qt with filter); the 2D Pickup, 6.0 U, 4WD, Automatic takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup, 6.0 U, 4WD, Part Time, Automatic takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup, 6.0 U, 4WD, Part Time, Standard takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup, 6.0 U, RWD, Automatic takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup, 6.0 U, RWD, Standard takes 5W-30 (6.0 quarts qt with filter); the 2D Pickup, 6.6 2, 4WD, Automatic takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup, 6.6 2, 4WD, Standard takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup, 6.6 2, RWD, Automatic takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup, 6.6 2, RWD, Standard takes 15W-40 (10.0 quarts qt with filter); the 2D Pickup, 8.1 G, 4WD, Automatic takes 5W-30 (6.5 quarts qt with filter); the 2D Pickup, 8.1 G, 4WD, Standard takes 5W-30 (6.5 quarts qt with filter); the 2D Pickup, 8.1 G, RWD, Automatic takes 5W-30 (6.5 quarts qt with filter); the 2D Pickup, 8.1 G, RWD, Standard takes 5W-30 (6.5 quarts qt with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- 2D Pickup Extra Cab, 6.0 U, 4WD, Automatic: 5W-30, 6.0 quarts with filter
- 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Automatic: 5W-30, 6.0 quarts with filter
- 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Standard: 5W-30, 6.0 quarts with filter
- 2D Pickup Extra Cab, 6.0 U, RWD, Automatic: 5W-30, 6.0 quarts with filter
- 2D Pickup Extra Cab, 6.0 U, RWD, Standard: 5W-30, 6.0 quarts with filter
- 2D Pickup Extra Cab, 6.6 2, 4WD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup Extra Cab, 6.6 2, 4WD, Standard: 15W-40, 10.0 quarts with filter
- 2D Pickup Extra Cab, 6.6 2, RWD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup Extra Cab, 6.6 2, RWD, Standard: 15W-40, 10.0 quarts with filter
- 2D Pickup Extra Cab, 8.1 G, 4WD, Automatic: 5W-30, 6.5 quarts with filter
- 2D Pickup Extra Cab, 8.1 G, 4WD, Standard: 5W-30, 6.5 quarts with filter
- 2D Pickup Extra Cab, 8.1 G, RWD, Automatic: 5W-30, 6.5 quarts with filter
- 2D Pickup Extra Cab, 8.1 G, RWD, Standard: 5W-30, 6.5 quarts with filter
- 2D Pickup, 6.0 U, 4WD, Automatic: 5W-30, 6.0 quarts with filter
- 2D Pickup, 6.0 U, 4WD, Part Time, Automatic: 5W-30, 6.0 quarts with filter
- 2D Pickup, 6.0 U, 4WD, Part Time, Standard: 5W-30, 6.0 quarts with filter
- 2D Pickup, 6.0 U, RWD, Automatic: 5W-30, 6.0 quarts with filter
- 2D Pickup, 6.0 U, RWD, Standard: 5W-30, 6.0 quarts with filter
- 2D Pickup, 6.6 2, 4WD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup, 6.6 2, 4WD, Standard: 15W-40, 10.0 quarts with filter
- 2D Pickup, 6.6 2, RWD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup, 6.6 2, RWD, Standard: 15W-40, 10.0 quarts with filter
- 2D Pickup, 8.1 G, 4WD, Automatic: 5W-30, 6.5 quarts with filter
- 2D Pickup, 8.1 G, 4WD, Standard: 5W-30, 6.5 quarts with filter
- 2D Pickup, 8.1 G, RWD, Automatic: 5W-30, 6.5 quarts with filter
- 2D Pickup, 8.1 G, RWD, Standard: 5W-30, 6.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 2D Pickup Extra Cab, 6.0 U, 4WD, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 6.0 U, RWD, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 6.0 U, RWD, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 6.6 2, 4WD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup Extra Cab, 6.6 2, 4WD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup Extra Cab, 6.6 2, RWD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup Extra Cab, 6.6 2, RWD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup Extra Cab, 8.1 G, 4WD, Automatic — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 8.1 G, 4WD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 8.1 G, RWD, Automatic — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup Extra Cab, 8.1 G, RWD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 6.0 U, 4WD, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 6.0 U, 4WD, Part Time, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 6.0 U, 4WD, Part Time, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 6.0 U, RWD, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 6.0 U, RWD, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 6.6 2, 4WD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup, 6.6 2, 4WD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup, 6.6 2, RWD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup, 6.6 2, RWD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | Use ONLY engine oils that have one of these designations: CI-4 or CH-4 for DURAMAX diesel engines. Use SAE 10W-30 if temperatures stay above 0Deg.F (-18Deg.C) before your next oil change. When it is very cold, Below 0Deg.F (-18Deg.C), you should use SAE 5W-30 to improve cold starting and prevent engine damage. DO NOT use other viscosity oils such as SAE 10W-40 or SAE 20W-50. |
| 2D Pickup, 8.1 G, 4WD, Automatic — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 8.1 G, 4WD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 8.1 G, RWD, Automatic — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| 2D Pickup, 8.1 G, RWD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
Complete Oil Change Bundle for 2005 GMC Cab & Chassis Sierra
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Buy the right oil & filter for your Cab & Chassis Sierra
🛒 Buy 5W-30 Full Synthetic Oil (6.0 quarts needed) on Amazon🛒 Buy 15W-40 Full Synthetic Oil (6.0 quarts needed) on Amazon💡 Capacity Note: Your 2005 GMC Cab & Chassis Sierra holds 6.0 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.
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More factory specs & repair guides for your Cab & Chassis Sierra
🛞 2005 GMC Cab & Chassis Sierra Tire Size & Pressure →🌧️ 2005 GMC Cab & Chassis Sierra Wiper Blade Sizes →💡 2005 GMC Cab & Chassis Sierra Light Bulb Sizes →📖 2005 GMC Cab & Chassis Sierra Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
16.7 quarts (15.8 L) — 50/50 mixture of DEX-COOL and clean, drinkable water. Add 2.1 qts. if equipped with rear heater.
Frequently asked questions
What type of oil does a 2005 GMC Cab & Chassis Sierra take?
It depends on the engine: 2D Pickup Extra Cab, 6.0 U, 4WD, Automatic uses 5W-30; 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Automatic uses 5W-30; 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Standard uses 5W-30; 2D Pickup Extra Cab, 6.0 U, RWD, Automatic uses 5W-30; 2D Pickup Extra Cab, 6.0 U, RWD, Standard uses 5W-30; 2D Pickup Extra Cab, 6.6 2, 4WD, Automatic uses 15W-40; 2D Pickup Extra Cab, 6.6 2, 4WD, Standard uses 15W-40; 2D Pickup Extra Cab, 6.6 2, RWD, Automatic uses 15W-40; 2D Pickup Extra Cab, 6.6 2, RWD, Standard uses 15W-40; 2D Pickup Extra Cab, 8.1 G, 4WD, Automatic uses 5W-30; 2D Pickup Extra Cab, 8.1 G, 4WD, Standard uses 5W-30; 2D Pickup Extra Cab, 8.1 G, RWD, Automatic uses 5W-30; 2D Pickup Extra Cab, 8.1 G, RWD, Standard uses 5W-30; 2D Pickup, 6.0 U, 4WD, Automatic uses 5W-30; 2D Pickup, 6.0 U, 4WD, Part Time, Automatic uses 5W-30; 2D Pickup, 6.0 U, 4WD, Part Time, Standard uses 5W-30; 2D Pickup, 6.0 U, RWD, Automatic uses 5W-30; 2D Pickup, 6.0 U, RWD, Standard uses 5W-30; 2D Pickup, 6.6 2, 4WD, Automatic uses 15W-40; 2D Pickup, 6.6 2, 4WD, Standard uses 15W-40; 2D Pickup, 6.6 2, RWD, Automatic uses 15W-40; 2D Pickup, 6.6 2, RWD, Standard uses 15W-40; 2D Pickup, 8.1 G, 4WD, Automatic uses 5W-30; 2D Pickup, 8.1 G, 4WD, Standard uses 5W-30; 2D Pickup, 8.1 G, RWD, Automatic uses 5W-30; 2D Pickup, 8.1 G, RWD, Standard uses 5W-30.
What is the oil capacity of a 2005 GMC Cab & Chassis Sierra?
Oil capacity depends on the engine: 2D Pickup Extra Cab, 6.0 U, 4WD, Automatic holds 6.0 quarts with filter; 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Automatic holds 6.0 quarts with filter; 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Standard holds 6.0 quarts with filter; 2D Pickup Extra Cab, 6.0 U, RWD, Automatic holds 6.0 quarts with filter; 2D Pickup Extra Cab, 6.0 U, RWD, Standard holds 6.0 quarts with filter; 2D Pickup Extra Cab, 6.6 2, 4WD, Automatic holds 10.0 quarts with filter; 2D Pickup Extra Cab, 6.6 2, 4WD, Standard holds 10.0 quarts with filter; 2D Pickup Extra Cab, 6.6 2, RWD, Automatic holds 10.0 quarts with filter; 2D Pickup Extra Cab, 6.6 2, RWD, Standard holds 10.0 quarts with filter; 2D Pickup Extra Cab, 8.1 G, 4WD, Automatic holds 6.5 quarts with filter; 2D Pickup Extra Cab, 8.1 G, 4WD, Standard holds 6.5 quarts with filter; 2D Pickup Extra Cab, 8.1 G, RWD, Automatic holds 6.5 quarts with filter; 2D Pickup Extra Cab, 8.1 G, RWD, Standard holds 6.5 quarts with filter; 2D Pickup, 6.0 U, 4WD, Automatic holds 6.0 quarts with filter; 2D Pickup, 6.0 U, 4WD, Part Time, Automatic holds 6.0 quarts with filter; 2D Pickup, 6.0 U, 4WD, Part Time, Standard holds 6.0 quarts with filter; 2D Pickup, 6.0 U, RWD, Automatic holds 6.0 quarts with filter; 2D Pickup, 6.0 U, RWD, Standard holds 6.0 quarts with filter; 2D Pickup, 6.6 2, 4WD, Automatic holds 10.0 quarts with filter; 2D Pickup, 6.6 2, 4WD, Standard holds 10.0 quarts with filter; 2D Pickup, 6.6 2, RWD, Automatic holds 10.0 quarts with filter; 2D Pickup, 6.6 2, RWD, Standard holds 10.0 quarts with filter; 2D Pickup, 8.1 G, 4WD, Automatic holds 6.5 quarts with filter; 2D Pickup, 8.1 G, 4WD, Standard holds 6.5 quarts with filter; 2D Pickup, 8.1 G, RWD, Automatic holds 6.5 quarts with filter; 2D Pickup, 8.1 G, RWD, Standard holds 6.5 quarts with filter.
How often should I change the oil in my 2005 GMC Cab & Chassis Sierra?
Most 2005 GMC Cab & Chassis Sierra 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 2005 GMC Cab & Chassis Sierra?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2005 GMC Cab & Chassis Sierra. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.