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 MANUALSCHEVROLET2005CHEVY EXPRESS G3500, VAN PASSENGER, LQ4REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSCELLULAR COMMUNICATION SYSTEMREPAIR INSTRUCTIONSCOMMUNICATION INTERFACE MODULE REPLACEMENTINSTALLATION PROCEDURE

2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4

Installation Procedure

2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4SECTION Installation Procedure

Fig 1: Electrical Connectors, Coaxial Cable & Module

Courtesy of GENERAL MOTORS CORP.

When replacing a VCIM, record the 11-digit electronic serial number (ESN) and the 10-digit station identification (STID) number from the label on the new VCIM.
Slide the communication interface module (3) into the bracket.
Push in on the module (3) at the retaining tab (2) until an audible click is heard indicating the module is secured to the bracket.
Connect the electrical connectors and the coaxial cable (2) to the communication interface module (3).

IMPORTANT: After replacing the vehicle communication interface module, you must reconfigure the OnStar® system. Failure to reconfigure the system will result in an additional customer visit for repair. In addition, pressing and holding the white dot button on the keypad will NOT reset this version of the OnStar® system. This action will cause a DTC to set.

Reconfigure the OnStar® system. Refer to OnStar Reconfiguration (Gen 6) or OnStar Reconfiguration (Gen 6.1) .

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.