99-02 Chevrolet/GMC All Full Size Trucks and Utilities Seat Lumbar Support Self Inflates - kw inflate intermittent pump switch unwanted adjust

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Customer may comment that their seat lumbar support inflates by itself. The seat lumbar support is mechanical and does not use an air bladder. The root cause for this concern is that the driver inadvertently activates the power lumbar switch when entering the truck.

The cover for the switch was redesigned for the 2003 model year to prevent this from occurring. The new cover will not fit previous model years due to a change in seat design. There will not be a new service switch or cover change for the previous model years.

.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(99-02 Chevrolet Full Size Trucks and Utilities) and (99-02 GMC Full Size Trucks and Utilities)

.