GM Service Manual Online
For 1990-2009 cars only

Fuse #35 supplies B+ to terminals 1 and 3 of the driver seat adjuster memory module connector C1 at all times. Fuse #15 supplies B+ to terminal 4 of the driver seat adjuster memory module connector C1 when the ignition switch is in the ON position. Ground is supplied to terminals 2 and 5 of the driver seat adjuster memory module connector C1 at all times. B+ and ground are supplied to the individual motors through the driver seat adjuster memory module you press any switch on the driver seat adjuster switch.

The memory system is a combination of the driver's seat and the inside and outside rear view mirrors. You may store the position for the driver seat and the inside and outside rear view mirrors in three different positions via the memory key and the three personal keys.

The driver's seat is adjusted by four different motors. Three of these motors are located underneath the seat and the fourth motor is located in the seat backrest. Each motor is equipped with potentiometers. These potentiometers report the current seat position to the driver seat adjuster memory module. The potentiometers also store the three different seat positions.

The driver seat adjuster memory module is located underneath the driver's seat. The driver seat adjuster memory module controls the entire memory system. The driver seat adjuster memory module stores all data, such as end stops and position data. The position of the driver's seat can be programmed into the driver seat adjuster memory module by using the memory key and any one of the personal keys. These keys are located on the driver seat adjuster switch.

Once the memory positions are stored into the driver seat adjuster memory module, the personal keys can activate the driver's seat. When you press one of the personal keys, the driver seat adjuster memory module activates the motors in the driver's seat, which moves the seat to the pre-programmed position.

When the ignition switch is turned to the OFF position, the driver seat memory module is on standby for approximately 30 seconds. After the 30 seconds, the driver seat adjuster memory module is disabled. When any door is opened and then closed, the driver seat adjuster is enabled for approximately 30 seconds after the door has closed.