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 MANUALSCHEVROLET2004AVALANCHE 2500 2WD V8-8.1L VIN GREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULESERVICE AND REPAIR
2004 Chevrolet Avalanche 2500 2WD V8-8.1L VIN G
Body Control Module: Service and Repair
2004 Chevrolet Avalanche 2500 2WD V8-8.1L VIN GSECTION Service and Repair
BODY CONTROL MODULE REPLACEMENT
REMOVAL PROCEDURE
1. Disconnect the negative battery cable(s).
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
2. Remove the knee bolster.
3. Disconnect the brown connector.
4. Disconnect all other connectors (1).
5. Remove the BCM from the sliding bracket.
INSTALLATION PROCEDURE
1. Slide the BCM onto the bracket.
2. Connect all the connectors (1) except the brown connector.
3. Connect the brown connector.
4. Install the knee bolster.
5. Connect the negative battery cable(s).
6. Reprogram the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration.
7. Perform the Passlock Learn Procedure. Programming and Relearning
REMOVAL PROCEDURE
1. Disconnect the negative battery cable(s).
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
2. Remove the knee bolster.
3. Disconnect the brown connector.
4. Disconnect all other connectors (1).
5. Remove the BCM from the sliding bracket.
INSTALLATION PROCEDURE
1. Slide the BCM onto the bracket.
2. Connect all the connectors (1) except the brown connector.
3. Connect the brown connector.
4. Install the knee bolster.
5. Connect the negative battery cable(s).
6. Reprogram the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration.
7. Perform the Passlock Learn Procedure. Programming and Relearning
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.