OnStar Services

See also:

When to Check and Change Automatic Transmission Fluid
A good time to check the automatic transmission fluid level is when the engine oil is changed. Change the fluid and filter at the intervals listed in Scheduled Maintenance and be sure to use th ...

Using Voice Commands During a Planned Route
Cancel Route 1. Push . System responds: “OnStar ready,” then a tone. Say “Cancel route.” System responds: “Would you like to cancel route directions to your destination?”. 2. Sa ...

Cleaning Exterior Lamps/Lenses
Use only lukewarm or cold water, a soft cloth and a car washing soap to clean exterior lamps and lenses. ...