
This light comes on briefly when the ignition is turned to ON/RUN as a check to show it is working.
If it does not come on have the vehicle serviced by your dealer.
If this light stays on, or comes on while driving, the system may not be working. If this happens, see your dealer for service.
Up-Shift Light
Lane Departure Warning (LDW) LightDome Lamp Bulb Replacement
Dome Lamp Bulb Replacement
Callout
Component Name
Preliminary Procedure
Remove the windshield header courtesy lamp. Refer to Windshield Header
Courtesy Lamp Replacement
1
Dome Lamp Bulb
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Electronic Ignition System Description
Electronic Ignition System Operation
The electronic ignition system produces and controls the high energy secondary
spark. This spark ignites the compressed air/fuel mixture at precisely the correct
time, providing optimal performance, fuel economy, and control of exhaust emissions.
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Transmission Fluid Cooler Flushing and Flow Test
GM studies indicate that plugged or restricted transmission oil coolers and pipes
cause insufficient transmission lubrication and elevated operating temperatures
which can lead to premature transmission failure. Many repeat repair cases could
have been prevented by following published procedur ...