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.

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HOMESERVICE MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 972 (BODY CONTROL SYSTEM)REPAIR INSTRUCTIONSBODY CONTROL MODULE REPLACEMENTINSTALLATION PROCEDURE

2002 Chevrolet Avalanche 2500, RWD

Installation Procedure

2002 Chevrolet Avalanche 2500, RWDSECTION Installation Procedure

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Align the BCM to the console accessory wiring junction block.

Install the BCM (1) onto the console accessory wiring junction block.

Fig 1: View Of BCM Retaining Lever
Courtesy of GENERAL MOTORS CORP.
Rotate the BCM retaining lever (2) to secure the BCM to the console accessory wiring junction block.
Install the console accessory wiring junction block. Refer to Console Electrical Center or Junction Block Replacement in Wiring Systems.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (LA1) or Battery Negative Cable Disconnect/Connect Procedure (LY7) in Engine Electrical.
Perform the new BCM setup. Refer to Body Control Module (BCM) Programming/RPO Configuration .

RENDER: 1.0x

NO RELATED

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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.