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.
2008 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE
Powertrain Management: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Diagnose/Test | ||||
| System Performance, Test | 1.3 | 0.0 | ||
| Diagnostic Circuit, Inspect | 0.5 | 0.0 | B | Includes: Time To Hook-Up And Disconnect Test Equipment And Perform Test. Does Not Include: Pinpoint Test Or Re-Test Upon Completion Of Repair. |
| NOTE | ||||
| To RE-Test System, Add | 0.3 | 0.0 | B | |
| Pinpoint, Test | 0.4 | 0.0 | B | To Test One Component Or Circuit Of A System. |
| Reset | ||||
| ECM, Reprogram | 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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