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 MANUALSCHEVROLET2005IMPALA BASE, 3.8 KREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTINFOTAINMENTCELLULAR COMMUNICATION SYSTEMSREPAIR INSTRUCTIONSCOMMUNICATION INTERFACE MODULE REPLACEMENTINSTALLATION PROCEDURE

2005 Chevrolet Impala Base, 3.8 K

Installation Procedure

2005 Chevrolet Impala Base, 3.8 KSECTION Installation Procedure

Fig 1: Communication Interface Module & Bolts

Courtesy of GENERAL MOTORS CORP.

Record the 11-digit electronic serial number (ESN) and the 10-digit station identification (STID) number from the label on the new VCIM.
Position the communication interface module to the bracket (2).

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the communication interface module bolts (1).
Tighten: Tighten the bolts to 10 N.m (89 lb in).
Connect the GPS antenna cable to the module.

Fig 2: Communication Interface Module Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Connect the electrical connectors to the module.
Connect the cellular antenna cable to the module.

IMPORTANT: After replacing the communication interface module, you must reconfigure the OnStar® system. Failure to reconfigure the system will result in an additional customer visit for repair.

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

Fig 3: Communication Interface Module Bracket Nuts

Courtesy of GENERAL MOTORS CORP.

Position the assembly to the studs.
Install the bracket nuts to the communication interface module.
Tighten: Tighten the nuts to 4 N.m (35 lb in).

Fig 4: Communication Interface Module Cover

Courtesy of GENERAL MOTORS CORP.

Install the communication interface module cover.
Close the rear compartment.

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.