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 Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Generator Battery Control Module Replacement

Fig 1: Generator Battery Control Module Replacement

Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedure:
Remove the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .

Clamp (Qty: 4)
Tip: Mark the location of the clamps for installation.

Generator Battery Control Module

Procedure

Disconnect the generator battery control module harness connector.
Remove the tape retaining the module to the negative battery cable and note the location for installation.
Remove the module from the cable.

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.