Vehicle and Power Issues :: OnStar Additional Information :: OnStar :: GMC Sierra Owners Manuals :: GMC Sierra | GMCia.com

Vehicle and Power Issues

GMC Sierra / GMC Sierra Owners Manuals / OnStar / OnStar Additional Information / Vehicle and Power Issues

OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.

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Front Seats
The vehicle's front seats have head restraints in the outboard seating positions. WARNING With head restraints that are not installed and adjusted properly, there is a greater chance that occu ...

Stop/Tail/Turn Signal/ Sidemarker Lamp
To replace one of these lamps: 1. Open the liftgate. See Liftgate on page 2‑9. 2. Remove the two screw covers from the taillamp assembly. 3. Remove the two screws securing the taillamp asse ...

Vehicle Reminder Messages
ICE POSSIBLE DRIVE WITH CARE This message is displayed when ice conditions are possible. TURN WIPER CONTROL TO INTERMITTENT FIRST This message is displayed when attempting to adjust the intermitten ...