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 G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1844 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM & NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESRADIO POOR RECEPTIONCIRCUIT/SYSTEM TESTINGANTENNA CIRCUIT TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Antenna Circuit Testing
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Antenna Circuit Testing
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the radio antenna coax cable from the radio and the radio antenna.
- Test for infinite resistance between the antenna coax center terminal and ground.
- If less than the specified value, replace the antenna coax.
- Test for less than 10 Ξ© on the antenna coax center terminal from end to end.
- If greater than the specified range, replace the antenna coax.
- Test for less than 10 Ξ© on the antenna coax outer shield from end to end.
- If greater than the specified range, replace the antenna coax.
- Test for infinite resistance between the coax center terminal and the outer shield.
- If less than the specified value, replace the antenna coax.
- Reconnect the coax to the radio antenna. Test for infinite resistance on the coax at the radio between the center terminal and the outer shield.
- If less then specified value, replace the antenna.
- Test for less than 10 Ξ© on the coax at the radio between the outer shield and ground.
- If greater than specified value, clean the mounting surface of the antenna ground plane. If no corrosion found, replace the antenna.
- If all circuits test normal, replace the radio.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.