Circuit/System 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.

Antenna Coaxial Cable Testing

The antenna coax may have one or two sections between the radio and the mast antenna.
- If greater than the specified range, replace the antenna coax.
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 5 ohms of resistance on the antenna coax center terminal from end to end.
- If greater than the specified range, replace the antenna coax.
Test for less than 5 ohms of resistance 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.

Rear Glass Antenna Inspection

Ignition OFF, disconnect the coax from the antenna located at the rear glass.
Verify the coax connector at the back glass is properly secured and free of any damage.
- If damage is found, repair or replace as necessary.
Inspect the antenna on the rear glass. Verify all branches of the antenna are intact, with no scratches or other damage.
- If damage is found, repair or replace as necessary.