Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
If ignition voltage is outside normal operating range, (9-16 volts), AIR BAG warning light will turn on with no DTC's set. Loss of serial data communication between SDM and IPC will also cause AIR BAG warning light to turn on.
NOTE:
For circuit number and wire color identification, see WIRING DIAGRAMS .