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 MANUALSGMC1998ENVOY 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULESERVICE AND REPAIR
1998 GMC Envoy 2WD V6-4.3L VIN W
Body Control Module: Service and Repair
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Service and Repair
REMOVAL PROCEDURE
Replacing the Body Control Module (BCM) may be necessary when you service the body control system.
1. Remove the left instrument panel sound insulator from the vehicle.
2. Remove the center instrument panel sound insulator from the vehicle.
3. Disconnect the electrical connectors from the body control module.
4. Bend the 2 snap retainers back slightly and pull the body control module from the bracket at an angle.
INSTALLATION PROCEDURE
1. Install the body control module to the bracket at an angle under the wide hook retainer, with the label facing away from the bracket.
2. Apply pressure on the left side of the body control module in order to move the module toward the mounting bracket base. Snap the module into place.
3. Ensure that the module is fully seated. Ensure that both snap retainers are holding the module.
4. Connect the electrical connectors to the body control module.
5. Install the center instrument panel sound insulator to the vehicle.
6. Install the left instrument panel sound insulator to the vehicle.
7. Use the following components in order to program the body control module with the proper calibrations:
^ The Techline Terminal
^ The scan tool
8. Perform the Learn Procedure.
9. Clear the diagnostic trouble codes (DTCs).
RENDER: 1.0x
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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.