The following 1997 Chevrolet Van G1500 Air Conditioning system Electrical Circuit and Wiring Diagram show detail interconnection between parts and components of the HVAC system which consists of blower motor, blower motor resistor/relay (located at HVAC control panel), heater and A/C controller, front and rear auxiliary HVAC control module, temperature valve actuator motor, A/C compressor low pressure cutoff switch, underhood fuse and relay canter, heater and A/C control logic module, A/C compressor clutch coil and relay, and vehicle control module.