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.
2007 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE
Heating and Air Conditioning: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Flush | ||||
| Flush (Complete) | 0.3 | 0.0 | B | FLUSH (COMPLETE)Is To Be Used In Conjunction With Component Replacement Which Could Contaminate System. |
| Evacuate/Recharge | ||||
| Evacuate & Recharge | 1.4 | 0.0 | B | With Any Operation Requiring A Refrigerant Line Disconnect, Add AC Service, I.E. Evacuate, Recharge And Final Test For Leaks. Add For Refrigerant Cost. |
| Partial Refrigerant Charge | 0.6 | 0.0 | B | With Any Operation Requiring A Refrigerant Line Disconnect, Add AC Service, I.E. Evacuate, Recharge And Test For Leaks. Add For Refrigerant Cost. |
| Recover | ||||
| Refrigerant Recover | 0.4 | 0.0 | B | Does Not Include: Evacuate & Recharge System. |
| Diagnose/Test | ||||
| System, Test | 1.0 | 0.0 | B | Includes: Partial Charge, Pressure and Leak Diagnosis. |
| Reset | ||||
| Reprogram With SPS | 0.5 | 0.0 | B |
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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