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 MANUALSCHEVROLET2013SILVERADO 2500 HD LT, 2D CAB CHASSIS, 6.6L ENG VIN 8, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTCELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B2455CIRCUIT/SYSTEM TESTING
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWD
Circuit/System Testing
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWDSECTION Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the cellular phone microphone.
- Ignition ON, test for 8.0-10.5 V between the microphone high signal circuit terminal 3 and ground.
- If less than the specified range, test the circuit for a short to ground, shorted together, or an open/high resistance. If the circuit tests normal, replace the vehicle communication interface control module.
- If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the vehicle communication interface control module.
- Test for 8.0-10.5 V between the microphone high signal circuit terminal 3 and the microphone low signal circuit terminal 2.
- If less than the specified range, test the microphone low signal circuit for a short to ground, shorted together, or an open/high resistance. If the circuit tests normal, replace the vehicle communication interface control module.
- If greater than the specified range, test the microphone low signal circuit for a short to voltage. If the circuit tests normal, replace the vehicle communication interface control module.
- If all circuit test normal, replace the cellular phone microphone.
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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.