HVAC Control Module X3 (CJ3)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: HVAC Control Module X3 (CJ3) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire Color	Circuit	Function
1	-	-	Not Used
2	0.35 YE/BK	713	Defrost/Heater Mode Valve Position Sensor Signal
3	-	-	Not Used
4	0.35 GY/BK	754	Blower Motor Speed Control
5-9	-	-	Not Used
10	0.35 GY	598	5-Volt Reference
11	-	-	Not Used
12	0.35 L-BU	733	Air Temperature Door Position Signal
13	0.35 D-BU	1646	Auxiliary Air Temperature Door Position Signal
14	-	-	Not Used
15	0.35 TN	2273	Mode Door Control
16	0.35 D-BU	1199	Air Temperature Door Control
17	0.35 D-GN	1614	Recirculation Door Control
18	0.35 WH/BK	1236	Auxiliary Air Temperature Door Control
19	-	-	Not Used
20	0.35 YE	1791	Low Reference

Connector Part Information

OEM: 15491304
Service: 15126710
Description: 20-Way F USCAR 0.64 Series (GY)

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)