Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
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.
- Remove the GPS antenna and cable and place it outside the vehicle. Verify the GPS reception is operational within 5 minutes.
- If GPS becomes operational, remove any suspect window tint or objects that may obstruct the GPS signal.
- Replace the GPS antenna. Verify the GPS reception is operational within 5 minutes.
- If GPS is not operational, replace the radio.