Underbody Maintenance
Use plain water to flush dirt and debris from the vehicle's underbody.
Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop.
See also:
Potential Issues
Some OnStar services are disabled after five days. OnStar cannot perform Remote
Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously
for five days. After five days, ...
Manual Windows
Turn the hand crank on each door to manually raise or lower the manual windows. ...
Express-Up/Express-Down Windows
A window with the express-up/down feature allows it to be raised or lowered without holding the switch.
Press or pull the window switch fully and release it to activate the express feature. The expre ...