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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 111 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2470COMPONENT TESTING
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Component Testing
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Component Testing
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The vehicle may be equipped with sectioned coax cable. Test each section and replace only the faulty section, not the entire length of coax.
- Ignition OFF, disconnect the coax harness connectors at the VCIM and the cellular antenna.
- Test for less than 5 ohms between the two ends of the coax cable center conductor.
- If greater than the specified range, replace the cellular antenna coax cable.
- Test for less than 5 ohms between the two ends of the coax cable outer shield.
- If greater than the specified range, replace the cellular antenna coax cable.
- Test for infinite resistance between the coax center conductor and the outer shield.
- If less than the specified range, replace the cellular antenna coax cable.
- Connect the coax harness connector at the VCIM.
- Ignition ON, test for 4.0-5.5 volts between the coax center conductor and the outer shield.
- If not within the specified range, 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.