gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

A/C Signal|Description and Operation|Page 3685 > < Valve Clearance|Specifications
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A/C Signal: Description and Operation

This signal indicated that the A/C compressor clutch is engaged. The Powertrain Control Module (PCM) uses this signal to adjust the idle speed.

A/C Signal|Description and Operation|Page 3685 > < Valve Clearance|Specifications