Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfere with the operation of the OnStar system and cause it to not operate.
See also:
Checking the Fluid Level
Prepare the vehicle as follows:
1. Park the vehicle on a level place. Keep the engine
running.
2. With the parking brake applied, place the shift lever
in P (Park).
3. With your foot on the bra ...
Storing a Radio Station as a Favorite
Drivers are encouraged to set up their radio station
favorites while the vehicle is in P (Park). Tune to favorite
stations using the presets, favorites button, and
steering wheel controls if the ...
When the Change Engine Oil Soon Message Displays
Change engine oil and filter. See Engine Oil . An Emission Control Service.
When the CHANGE ENGINE OIL SOON message displays, service is required for the vehicle as soon as possible, within the next ...