HVAC Control Module Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12045575 32-Way F Micro-Pack 100 Series (BLK)
Pin	Wire Color	Circuit No.	Function
C1	LT BLU/BLK	590	Sunload Sensor Signal
C2	BRN	404	Upper Air Temperature Sensor Signal
C3	LT GRN	405	Lower Air Temperature Sensor Signal
C4	LT BLU	733	Air Temperature Door Position Signal
C5	PPL	1838	Recirculation Door Position Signal
C6	BRN	341	Ignition 3 Voltage
C7	DK GRN	1614	Recirculation Door Control
C8	WHT	119	Mode Door Control
C9	DK BLU	1199	Air Temperature Door Control
C10	BLK	2450	Ground
C11	WHT	1038	HVAC Class 2 Serial Data
C12	ORN	340	Battery Positive Voltage
C13-C15	-	-	Not Used
C16	GRY/BLK	754	Blower Motor Speed Control
D1	DK GRN	734	Inside Air Temperature Sensor Signal
D2	LT GRN/BLK	735	Ambient Air Temperature Sensor Signal
D3	RED	708	Mode Door Position Signal
D4	-	-	Not Used
D5	GRY	598	5 Volt Reference
D6	-	-	Not Used
D7	GRY	8	Instrument Panel Lamp Supply Voltage - 1
D8	LT BLU	203	A/C Request Signal
D9	BRN	718	Low Reference
D10	GRY/BLK	1798	Ground
D11	LT BLU	2820	HVAC Control Module Clock Signal
D12	RED	2819	HVAC Control Module Data Signal
D13	-	-	Not Used
D14	WHT	193	Rear Defog Relay Control
D15-D16	-	-	Not Used