HVAC Control Module X1

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: HVAC Control Module X1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 L-GN/BK	735	Ambient Air Temperature Sensor Signal
2	0.35 D-GN	734	Inside Air Temperature Sensor Signal
3	0.35 WH	193	Rear Defog Relay Control
4	-	-	Not Used
5	0.35 GY/BK	754	Blower Motor Speed Control
6-7	-	-	Not Used
8	0.35 D-GN	5060	Low Speed GMLAN Serial Data
9	0.35 OG	300	Ignition 3 Voltage
10	0.35 BK/WH	351	Ground
11	0.35 YE	61	Low Reference
12	0.35 L-BU/BK	590	Driver Sunload Sensor Signal
13	0.35 GY	1548	Passenger Sunload Sensor Signal
14-16	-	-	Not Used
17	0.35 D-GN	5060	Low Speed GMLAN Serial Data
18	0.35 OG	540	Battery Positive Voltage

Connector Part Information

OEM: 7283-4544-30
Service: 89047360
Description: 18-Way F (BK)

Terminal Part Information

Pins: 1-3, 5, 8-13, 17, 18
Terminal/Tray: 7116-4618-02
Core/Insulation Crimp: P/P
Release Tool/Test Probe: See Terminal Repair Kit