Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. In most cases the GPS will not have reception near tall buildings or inside structures.
- Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.
- Ignition ON, test for 4.5-5.5 V between the coax cable center conductor terminal at the radio and ground.
- If not within the specified range, replace the radio.
- If all circuits test normal, replace the GPS antenna.