GM Service Manual Online
For 1990-2009 cars only

Condition

Possible Cause

Correction

Horizontal Operation of Seat Not Smooth but Jerky-Apparent Hard Operation

The adjuster horizontal actuator is damaged.

Replace the adjuster assembly.

Horizontal Chuck or Looseness

    • The horizontal actuator is improperly adjusted to the rack.
    • The top plate subassembly is loose.
    • Replace the adjuster assembly.
    • Replace the adjuster assembly.

One Adjuster Will Not Operate Horizontally

    • The horizontal drive cable is disconnected or damaged.
    • The horizontal actuator is inoperative.
    • Inspect the drive cables, they must be stright to be engaged. Replace if damaged.
    • Replace the adjuster assembly.

One Adjuster Will not Operate Vertically

    • The vertical drive cable is disconnected or damaged.
    • The vertical actuator subassembly is inoperative.
    • Inspect the vertical drive cables, replace if damaged.
    • Replace the adjuster assembly.

Both Adjusters Will Not Operate Horizontally and/or Vertically

    • The motor is damaged or inoperative.
    • The wiring harness is damaged.
    • Replace the adjuster assembly
    • Replace the wiring harness.

Vertical Chuck or Looseness

The vertical actuator is inoperative.

Replace the adjuster assembly.