GM Service Manual Online
For 1990-2009 cars only

Without Memory

Each outside rearview mirror has two reversible DC motors. One motor adjusts the mirror to the UP/DOWN (vertical) position and the other motor adjusts the mirror to LEFT/RIGHT (horizontal) position. The driver door window/mirror switch is used to control the direction of the outside rearview mirrors. The inside rearview mirror can be manually adjusted by tilting the mirror.

With Memory

The outside rearview mirrors contain two reversible DC motors and two position sensors. One motor adjusts the mirror to the UP/DOWN (vertical) position and the other motor adjusts the mirror to LEFT/RIGHT (horizontal) position. The driver memory seat module monitors the position sensors to determine the position of the mirrors. The driver memory seat module stores the position of the mirrors when a memory feature is requested.