2003 GMC Cab & Chassis Sierra Oil Type & Capacity
The 2003 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 with filter); the 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Automatic takes 5W-30 (6.0 quarts with filter); the 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Standard takes 5W-30 (6.0 quarts with filter); the 2D Pickup Extra Cab, 6.0 U, RWD, Automatic takes 5W-30 (6.0 quarts with filter); the 2D Pickup Extra Cab, 6.0 U, RWD, Standard takes 5W-30 (6.0 quarts with filter); the 2D Pickup Extra Cab, 6.6 1, 4WD, Automatic takes 15W-40 (10.0 quarts with filter); the 2D Pickup Extra Cab, 6.6 1, 4WD, Standard takes 15W-40 (10.0 quarts with filter); the 2D Pickup Extra Cab, 6.6 1, RWD, Automatic takes 15W-40 (10.0 quarts with filter); the 2D Pickup Extra Cab, 6.6 1, RWD, Standard takes 15W-40 (10.0 quarts with filter); the 2D Pickup Extra Cab, 8.1 G, 4WD, Automatic takes 5W-30 (6.5 quarts with filter); the 2D Pickup Extra Cab, 8.1 G, 4WD, Standard takes 5W-30 (6.5 quarts with filter); the 2D Pickup Extra Cab, 8.1 G, RWD, Automatic takes 5W-30 (6.5 quarts with filter); the 2D Pickup Extra Cab, 8.1 G, RWD, Standard takes 5W-30 (6.5 quarts with filter); the 2D Pickup, 6.0 U, 4WD, Automatic takes 5W-30 (6.0 quarts with filter); the 2D Pickup, 6.0 U, 4WD, Part Time, Automatic takes 5W-30 (6.0 quarts with filter); the 2D Pickup, 6.0 U, 4WD, Part Time, Standard takes 5W-30 (6.0 quarts with filter); the 2D Pickup, 6.0 U, RWD, Automatic takes 5W-30 (6.0 quarts with filter); the 2D Pickup, 6.0 U, RWD, Standard takes 5W-30 (6.0 quarts with filter); the 2D Pickup, 6.6 1, 4WD, Automatic takes 15W-40 (10.0 quarts with filter); the 2D Pickup, 6.6 1, 4WD, Standard takes 15W-40 (10.0 quarts with filter); the 2D Pickup, 6.6 1, RWD, Automatic takes 15W-40 (10.0 quarts with filter); the 2D Pickup, 6.6 1, RWD, Standard takes 15W-40 (10.0 quarts with filter); the 2D Pickup, 8.1 G, 4WD, Automatic takes 5W-30 (6.5 quarts with filter); the 2D Pickup, 8.1 G, 4WD, Standard takes 5W-30 (6.5 quarts with filter); the 2D Pickup, 8.1 G, RWD, Automatic takes 5W-30 (6.5 quarts with filter); the 2D Pickup, 8.1 G, RWD, Standard takes 5W-30 (6.5 quarts 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 1, 4WD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup Extra Cab, 6.6 1, 4WD, Standard: 15W-40, 10.0 quarts with filter
- 2D Pickup Extra Cab, 6.6 1, RWD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup Extra Cab, 6.6 1, 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 1, 4WD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup, 6.6 1, 4WD, Standard: 15W-40, 10.0 quarts with filter
- 2D Pickup, 6.6 1, RWD, Automatic: 15W-40, 10.0 quarts with filter
- 2D Pickup, 6.6 1, 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. | — | — |
| 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup Extra Cab, 6.0 U, 4WD, Part Time, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup Extra Cab, 6.0 U, RWD, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup Extra Cab, 6.0 U, RWD, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup Extra Cab, 6.6 1, 4WD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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 1, 4WD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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 1, RWD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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 1, RWD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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. | — | — |
| 2D Pickup Extra Cab, 8.1 G, 4WD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
| 2D Pickup Extra Cab, 8.1 G, RWD, Automatic — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
| 2D Pickup Extra Cab, 8.1 G, RWD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
| 2D Pickup, 6.0 U, 4WD, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup, 6.0 U, 4WD, Part Time, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup, 6.0 U, 4WD, Part Time, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup, 6.0 U, RWD, Automatic — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup, 6.0 U, RWD, Standard — 6.0L Eng | API - SAE 5W-30 | 6.00 QTS. | — | — |
| 2D Pickup, 6.6 1, 4WD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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 1, 4WD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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 1, RWD, Automatic — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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 1, RWD, Standard — 6.6L Eng | API - SAE 15W-40 | 10.00 QTS. | — | 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. | — | — |
| 2D Pickup, 8.1 G, 4WD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
| 2D Pickup, 8.1 G, RWD, Automatic — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
| 2D Pickup, 8.1 G, RWD, Standard — 8.1L Eng | API - SAE 5W-30 | 6.50 QTS. | — | — |
Buy the right oil
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More specs & repair guides for your Cab & Chassis Sierra
2003 GMC Cab & Chassis Sierra factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
13.0 quarts (12.3 L) — 50/50 mixture of DEX-COOL and clean, drinkable water. After refill, the level must be checked. Add enough engine coolant so that the fluid is within the proper operating range.
Frequently asked questions
What type of oil does a 2003 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 1, 4WD, Automatic uses 15W-40; 2D Pickup Extra Cab, 6.6 1, 4WD, Standard uses 15W-40; 2D Pickup Extra Cab, 6.6 1, RWD, Automatic uses 15W-40; 2D Pickup Extra Cab, 6.6 1, 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 1, 4WD, Automatic uses 15W-40; 2D Pickup, 6.6 1, 4WD, Standard uses 15W-40; 2D Pickup, 6.6 1, RWD, Automatic uses 15W-40; 2D Pickup, 6.6 1, 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.
How much oil does a 2003 GMC Cab & Chassis Sierra take?
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 1, 4WD, Automatic holds 10.0 quarts with filter; 2D Pickup Extra Cab, 6.6 1, 4WD, Standard holds 10.0 quarts with filter; 2D Pickup Extra Cab, 6.6 1, RWD, Automatic holds 10.0 quarts with filter; 2D Pickup Extra Cab, 6.6 1, 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 1, 4WD, Automatic holds 10.0 quarts with filter; 2D Pickup, 6.6 1, 4WD, Standard holds 10.0 quarts with filter; 2D Pickup, 6.6 1, RWD, Automatic holds 10.0 quarts with filter; 2D Pickup, 6.6 1, 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.
Can I use synthetic oil in my 2003 GMC Cab & Chassis Sierra?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2003 GMC Cab & Chassis Sierra. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.