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, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1219 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2470COMPONENT TESTING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Component Testing
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Component Testing
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length of coax.
- Disconnect the cellular antenna coax connector from the VCIM and the cellular antenna.
- Test for infinite resistance between the center conductor and the outer metal shield of the cellular antenna coax cable.
- If meter does not read infinite, replace the cellular antenna coax cable.
- Test for less than 1 ohm of resistance at the cellular antenna coax connector from end to end.
- If greater than specified value, replace the cellular antenna coax cable.
- Ignition OFF, connect a fused jumper wire between coaxial center conductor and the metal outer shield at the VCIM antenna coax cable connector.
- Ignition ON, verify that DTC B2470 is not current.
- If DTC B2470 is still current, replace the VCIM.
- If all circuits test normal, replace the cellular 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.