See also:

Trailer Towing (Except CTS-V and Coupe)
Before pulling a trailer, there are three important considerations that have to do with weight: - The weight of the trailer. - The weight of the trailer tongue. - The total weight on the vehicl ...

Diagnostics
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 v ...

Lumbar Adjustment
To adjust the lumbar support: Press and hold the front or rear of the control to increase or decrease lumbar support. Press and hold the top or bottom of the control to raise or lower the ...