What to Use

Refer to Recommended Fluids and Lubricants   to determine what kind of lubricant to use. ...

When to Check Lubricant

It is not necessary to regularly check rear axle fluid unless there is a leak suspected or an unusual noise is heard. A fluid loss could indicate a problem. Have it inspected and repaired. All axle ...

See also:

4WD shift indicator
The 4WD shift indicator is displayed in the vehicle information display. The indicator should turn off within 1 second after placing the ignition switch in the ON position. While the engin ...

Immobilizer
The immobilizer prevents your vehicle from being started without the correct SmartKey. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. The engine can be started ...

Navigation
OnStar navigation requires the Directions and Connections service plan. Push to receive directions or have them sent to the vehicle navigation screen. Destinations can also be forwarded to the veh ...