GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1999 🢒 Grand Prix 🢒 Body and Accessories 🢒 Seats 🢒 Lumbar Support System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Move the driver seat lumbar adjuster switch to the aft position.
  2. Move the driver seat lumbar adjuster switch to the fore position.
  1. The driver seatback lumbar support decreases.
  2. The driver seatback lumbar support increases.

2
  1. Move the driver seat lumbar adjuster switch to the up position.
  2. Move the driver seat lumbar adjuster switch to the down position.
  1. The driver seatback lumbar support moves up.
  2. The driver seatback lumbar support moves down.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.