OnStar Vehicle Diagnostics will perform a vehicle check every month. It will
check the engine, transmission, antilock brakes, and major vehicle systems. It also
checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring
System. If a diagnostics check is needed between e-mails, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationForward Lamp Wiring Harness Replacement
Preliminary Procedures
Remove the front bumper. Refer to Front Bumper Fascia Replacement.
Remove the headlamp. Refer to Headlamp Replacement.
Using a scan tool, check for DTCs.
Forward Lamp Wiring Harness
Tip
Create a work area large enough to lay out the new and old wiring
ha ...
Removal Procedure
Warning: Refer to Cracked Window Warning in the Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Note: Position the vehicle on level ground and move the front
wheels to the straight-ahead position.
Disconnect battery.
Remove quarter window ...
StabiliTrak® OFF Light
This light comes on briefly while starting the engine. If it does not, have the
vehicle serviced by your dealer.
This light comes on when the StabiliTrak system is turned off.
If StabiliTrak is off, the Traction Control System (TCS) is also off.
If the TCS is off, the system does not assist i ...