GM Service Manual Online
For 1990-2009 cars only

This feature assists the driver by improving rear obstacle detection and is useful in viewing the curb when parallel parking.

Press the left or right mirror symbol on the selector control to choose the driver or passenger outside mirror. When the vehicle is shifted into REVERSE (R), the selected mirror will tilt to a factory programmed position. If further mirror adjustment is needed press the arrows located on the outside mirror control pad. If the outside mirror selector switch is in the middle position, neither outside mirror will move.

When the vehicle is shifted out of REVERSE (R), and a five-second delay has occurred, the mirror will return to its original position. The delay prevents movement of the mirror if multiple gear transitions REVERSE (R) to AUTOMATIC OVERDRIVE (D) to REVERSE (R) occur during a parallel parking maneuver.