OnStar

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Buying New Tires
GM has developed and matched specific tires for the vehicle. The original equipment tires installed were designed to meet General Motors Tire Performance Criteria Specification (TPC Spec) system rat ...

Erasing Speed Memory
The cruise control set speed is erased from memory by pressing the button or if the ignition is turned off. ...

Weight of the Trailering Combination
It is important that the combination of the tow vehicle and trailer does not exceed any of its weight ratings — GCWR, GVWR, RGAWR, Trailer Weight Rating or Tongue Weight. The only way to be sure i ...