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) | |
|---|---|---|
| Coolant Heater | 37 (50) | |
| Engine Coolant Temperature Sensor (6.6L) | 24 (33) | |
| Fan Clutch Bolt | 17 (23) | |
| Fan Clutch Nut | 41 (56) | |
| Oil Cooler Hose Bracket Bolt (6.0L) | 18 (25) | |
| Radiator Bolt | 18 (25) | |
| Thermostat Housing Bolt | 11 (15) | |
| Water Pump Bolt | ||
| First Pass | 11 (15) | |
| Final Pass | 22 (30) | |
| INCH Lbs. | ||
| Air Cleaner Outlet Duct Clamp Screw | 62 (7) | |
| Coolant Air Bleed Pipe Stud/Bolt | 106 (12) | |
| Coolant Heater Cord Bolt | 71 (8) | |
| Fan Shroud Bolt | 80 (9) | |
| Oil Cooler Hose Adapter Bolt (6.0L) | 106 (12) | |
| Surge Tank Bolt/Nut | 80 (9) | |
| Transmission Control Module (TCM) Cover Bolt | 80 (9) | |
| Transmission Control Module (TCM) Electrical Connector Bolt | 71 (8) | |
Factory Service Tools
Use the Manual With the Right Hardware
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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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