See also:

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 lo ...

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...

When to Change Engine Oil
This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving condi ...