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. Set the control assembly to 16°C (60°F).

The A/C compressor clutch engages and cold air flows from the outlets.

2

  1. Start the engine.
  2. Place the gear selector lever in PARK.
  3. Set the control assembly to 16°C (60°F).
  4. Turn the control assembly off.

The A/C compressor clutch disengages and no air flows from the outlets.

HVAC Compressor Clutch Does Not Disengage

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