Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Hummer H2FACTORY OEM SERVICE PROCEDURE
Engine Controls - Service & Adjustment Specifications - 6.0L: Capacities
FLUID CAPACITY (CRANKCASE) (1)
| Application | (2) Quantity Qts. (L) | ||||
|---|---|---|---|---|---|
| All Models | 6.0 (5.7) | ||||
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FLUID CAPACITY (COOLING SYSTEM) (1)
| Application | (2) Quantity Qts. (L) | |||||
|---|---|---|---|---|---|---|
| Chevy Express (Gasoline), Hummer H2 & Savana | 14.8 (14.0) | |||||
| Chevy Express (CNG & Bi-Fuel) | ||||||
| With Rear Heater | 21.0 (20.0) | |||||
| Without Rear Heater | 18.0 (17.0) | |||||
| Escalade & Yukon | ||||||
| A/T | 15.8 (15.0) | |||||
| A/T With Optional Oil Cooler | 15.4 (14.6) | |||||
| Sierra & Silverado | ||||||
| A/T | 14.8 (14.0) | |||||
| A/T With Optional Oil Cooler | 14.4 (13.6) | |||||
| M/T | 15.2 (14.4) | |||||
| M/T With Optional Oil Cooler | 14.8 (14.0) | |||||
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FLUID CAPACITY (AUTOMATIC TRANSMISSION) (1)
| Application | (2) Quantity Qts. (L) | |||||
|---|---|---|---|---|---|---|
| All Models | ||||||
| 4L60-E | 5.0 (4.7) | |||||
| 4L80-E | 7.7 (7.3) | |||||
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FLUID CAPACITY (MANUAL TRANSMISSION) (1)
| Application | Quantity Pts. (L) | |||||||
|---|---|---|---|---|---|---|---|---|
| Sierra & Silverado | ||||||||
| NV3500 | (2) 4.8 (2.3) | |||||||
| NV4500 | (3) 8.0 (3.8) | |||||||
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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