HVAC Control Module X1

WARNING: This page is about a different car, the 2008 Cadillac DTS. 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 GY	598	5-Volt Reference
2	0.35 BN	64	High Blower Motor Relay Control (CJ4)
3	0.35 WH	193	Rear Defog Relay Control
4	0.35 D-GN	5060	Low Speed GMLAN Serial Data
5	0.35 D-GN	5060	Low Speed GMLAN Serial Data
6	-	-	Not Used
7	0.35 GY/PK	754	Blower Motor Speed Control
8	-	-	Not Used
9	0.35 OG/PK	1840	Battery Positive Voltage
10	0.35 GY/BK	1798	Low Reference
11	0.35 BK	350	Ground
12-14	-	-	Not Used
15	0.35 WH/BK	5515	Air Temperature Motor Control
16-17	-	-	Not Used
18	0.35 PK	339	Ignition 1 Voltage

Connector Part Information

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

Terminal Part Information

Terminal/Tray: 7116-4618-02/14
Core/Insulation Crimp: P/P
Release Tool/Test Probe: J-38125-215/J-35616-64B (L-BU)