C 1500 Yukon 2WD V8-4.8L VIN V (2000)
of the A/C compressor resumes.
The A/C automatic recirculating switch is a secondary high pressure switch, located at the lower right front of the A/C condenser, that will close when
high side pressure is detected. The PCM/VCM monitors this switch operation. The PCM/VCM will place the A/C air delivery system in a recirculating
mode until the high side pressure returns to normal.
The HVAC control module consists of the following components:
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A 6 way blower switch
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A rotary air delivery switch
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An air mix rotary control switch
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An air source discrete push buttons that select between outside and recirculated air
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An A/C compressor discrete request button and a rear defrost discrete push button with a built in timer
The HVAC control module also has LEDs (light emitting diodes) for the A/C request and defrost that will illuminate when selected.
