K 1500 Suburban 4WD V8-393 6.5L DSL Turbo VIN S (1996)
A/C Signal: Testing and Inspection
A/C Request Circuit Check
Go to A/C Controls.
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 tunction, refer to A/C Systems for diagnosis of the system.
