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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.3 T, 4L60E/M30REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1658 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2462 (COMMUNICATION INTERFACE MODULE)CIRCUIT/SYSTEM TESTING (COMMUNICATION INTERFACE MODULE)
2006 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.3 T, 4L60E/M30
Circuit/System Testing (Communication Interface Module)
2006 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.3 T, 4L60E/M30SECTION Circuit/System Testing (Communication Interface Module)
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the GPS antenna coax cable from the CIM.
- Ignition ON, test for 4.5-5.5 V between the CIM coax cable center conductor terminal at the module and ground.
- If not within the specified range, replace the CIM.
- Reconnect the coax cable to the CIM. Disconnect the coax cable from the GPS antenna.
- Test for 4.5-5.5 V between the coax cable center conductor and the outer shield.
- If not within the specified range, replace the coax cable.
- If all circuits test normal, replace the GPS antenna.
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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.