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Home >> GMC >> 1998 >> Suburban K2500, 6.5 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Engine Controls - System & Component Testing - 6.5L) >> Miscellaneous Pcm Controls >> A/C Compressor Clutch Controls

A/C Compressor Clutch Controls

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1997 GMC Yukon, 1997 GMC Suburban, 1997 GMC Pickup, 1997 GMC Cab & Chassis, and 1997 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The A/C compressor clutch relay is controlled by the PCM. The PCM improves idle quality by delaying A/C compressor clutch engagement until idle speed is increased, or disengages A/C compressor clutch when idle speed is too low. A/C compressor clutch is cycled by PCM. PCM smooths cycling of A/C compressor clutch by adding fuel the instant A/C compressor clutch is applied.

NOTE: See the WIRING DIAGRAMS article for component location, terminal and wire color identification.
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