GM Service Manual Online
For 1990-2009 cars only

Front Seat With Power Seatback Recliner

The floor bucket seats are equipped with headrest restraints which are adjustable and can be released by the two tabs located at the base of headrest restraint. The drivers seat comes standard with a power seat recliner and 8-way power seat adjusters. The passenger seat comes with the following standard components:

    • The power height adjuster
    • The power recliner
    • The manual seat adjusters
        The optional passenger seat comes with a power seat recliner and 8-way power seat adjusters. Both seats are also equipped with manual lumbar supports and heated seat and seatbacks. The driver's seat is equipped with a three-way memory feature. The front seat is secured to the floor by nuts and washers which retain the seat to the anchor plate studs. The seat adjuster trim covers are installed over the front and rear anchor plate studs. The power seat adjuster and memory switches are located on the front seat cushion outer finish panel.

Front Seatback Power Recliner and Power Switch Functions

The front power seat control switch has a time-out feature. After you open the door the seat memory module has to see ignition power within 30 seconds or the module will time out. You must reopen he door in order to use the memory switch without using ignition power. The seat adjustments are made using the control switches which are located on the outer finish panel of the front seat cushion. Adjust the seat using four power actuator motors. The actuator motors are driven by the seat memory module. The seat memory module receives input from the seat control switches. The seat can be moved in any direction. Refer to Seat Adjuster Control Switch .

Programming Of Memory Module

After replacement of the memory module or of one of the actuator motors which have potentiometers, reprogram the memory module.

During programming all of the seat motors are run through their full travel in order to program the values for the potentiometers and the end stops.

Do NOT occupy any of the seats during programming, because during programming no pinch guard is available.

Refer to Memory Seat/Mirror Personalization - Programming .

Seat Motors With Potentiometer

    • The memory seats are not like the electrically adjustable seats without memory. In addition potentiometers are attached to the seat actuator motors. These potentiometers constantly report the current seat position to the memory module.
    • The seat actuator motors are equipped with overload protectors. If the seats meet an obstruction, the current supply to the actuator motor is interrupted. If the actuator motor for longitudinal adjustment should malfunction, adjust the seat with an emergency crank tool stored in the vehicle tool set.
    • Four actuator motors are required for the 8 adjustment options. Three of these (the seat longitudinal adjustment, the seat height adjustment, and the seat inclination adjustment) are located in the seat cushion. The actuator motor for the seatback recliner adjustment is located in the seatback.

Setting Memory Seats and Memory Mirrors

The drivers seat and the inside and the outside mirrors are combined into each memory setting. The seat memory module controls these functions.

Important: When you replace the memory module control, reprogram the control using a scan tool. Refer to Memory Seat/Mirror Personalization - Programming .

Up to three users can program their individual seat and mirror positions and recall them as required. In order to store the adjustment positions, place the drivers seat, the inside rearview mirror, and the outside rear view mirror to the desired position. Press the memory switch (M) and the relevant position switch (1,2,3) simultaneously.

Once you have programmed the memory setting, the inner and outer mirrors and the driver's seat will return automatically to their programmed positions whenever the driver presses the appropriate memory position switch (1,2,3). You can electrically adjust the outer mirror using the power mirror switch, but the new position will not be stored in memory unless the memory is reprogrammed.

Anti-Submarining Switch

The anti-submarining switch, which is installed in the seat, prevents the driver or passenger seat from tilting too far forward, which could allow the occupant to slide under the seat belt in the event of a accident.

This switch interrupts the current feed to the seat inclination adjustment actuator motor as soon as the seat height at the front is 10 mm (0.4 in) lower than the rear.