GM Service Manual Online
For 1990-2009 cars only

Refer to

Engine Controls (Cell 22: A/C Controls)


Object Number: 191339  Size: FS
Engine Controls Components
Engine Controls (Cell 22: A/T Controls 2)
Handling ESD Sensitive Parts Notice
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Circuit Description

Turning ON the air conditioning supplies ignition voltage to the A/C compressor clutch and to the PCM to increase and maintain idle speed.

The PCM does not control the A/C compressor clutch. Therefore, if the A/C system does not function, refer to A/C Systems.