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
Scan Tool Data Definitions
Scan Tool Data Definitions
Accy. Relay Command
- The scan tool displays On/Off. The body control module will indicate if it is commanding the RAP/ACCY relay On or Off.
Rear Defog Relay Cmd.
- The scan tool displays On/Off. The body control module will indicate if it is commanding the rear defog relay On or Off.
Rear Defog Switch
- The scan tool displays Active/Inactive. The BCM receives an input from the HVAC control head indicating Active when the rear defog system is turned On.
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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