OnStar
See also:
Heavy-DutyTrailer Wiring Harness Package
For vehicles equipped with heavy duty trailering, the harness connector is mounted in the bumper.
The seven-wire harness contains the following trailer circuits:
• Yellow: Left Stop/Turn Signal
...
Express Down Windows
Windows that have the express&-down feature allow the windows to be lowered without
holding the switch. Press the window switch fully and release it to activate the
express&-down feature. ...
Folding Mirrors
Vehicles with outside power foldaway mirrors have controls on the driver door. ...





