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
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) |
|---|---|
| Battery Cable Bracket Bolt | 18 (25) |
| Battery Hold-Down Retainer Bolt | 18 (25) |
| Battery Tray Nut | 18 (25) |
| Engine Wiring Harness Auxiliary Negative Battery Cable Bolt | 12 (16) |
| Engine Wiring Harness Ground Bolt | 12 (16) |
| Engine Wiring Harness Ground/Negative Cable Bolt | 18 (25) |
| Front Axle Mounting Bracket Nut | 70 (95) |
| Generator Bracket Bolt | 37 (50) |
| Generator Bolt | 37 (50) |
| Negative Battery Cable Bolt | 13 (17) |
| Positive Battery Cable Bolt | 13 (17) |
| Starter Bolt | 37 (50) |
| INCH Lbs. (N.m) | |
| Battery Cable Channel Bolt | 106 (12) |
| Battery Tray Bolt | 80 (9) |
| Forward Lamp Wiring Harness Ground/Negative Cable Bolt | 80 (9) |
| Front End Diagonal Brace Bolt | 80 (9) |
| Generator Cable Nut | 80 (9) |
| Ground Strap Nut | 80 (9) |
| Positive Cable Nut | 80 (9) |
| Positive Cable At UBEC Bolt | 80 (9) |
| Starter Lead Nut | 30 (3.4) |
| Surge Tank Bolt/Nut | 80 (9) |
| Transmission Cover Bolt | 80 (9) |
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:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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