GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Start the engine.
  2. Place the gear selector lever in PARK.
  3. Adjust the blower speed with the control assembly.

The blower speed varies according to the control assembly.

2

  1. Start the engine.
  2. Place the gear selector lever in PARK.
  3. Adjust the rear blower speed with the rear control assembly.

The rear blower speed varies according to the rear control assembly.

Auxiliary Blower Motor Inoperative at Any Speed

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