GM Service Manual Online
For 1990-2009 cars only

Action

Normal Result(s)

Abnormal Result(s)

  1. Turn the ignition switch to the RUN position.
  2. Press the OFF button.

The blower motor is OFF.

Blower Motor Always On .

  1. Increase the blower speed to the fastest position and all of the indicator LED's are lit.
  2. Decrease the blower speed to the lowest speed all of the indicator LED's are off.

The blower motor increases to the maximum speed and then decreases to the minimum speed.

Blower Motor Inoperative at Any Speed .

  1. Turn the ignition switch to the RUN position
  2. Press the AUTO button.

The system switches to AUTO mode where the blower speed is controlled by the heater-A/C control.

Blower Motor Inoperative at Any Speed .