HVAC Control Module X1 (CJ2)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: HVAC Control Module X1 (CJ2) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	0.35 WH/BK	5515	Inside Air Temperature Sensor Assembly Control
2-3	-	-	Not Used
4	0.35 D-GN	734	Inside Air Temperature Sensor Signal
5	0.35 GY	1548	Passenger Sunload Sensor Signal
6	0.35 BN	404	Upper Air Temperature Sensor Signal (C69)
7	0.35 L-GN	405	Lower Air Temperature Sensor Signal (C69)
8-10	-	-	Not Used
11	0.5 PK	2014	Coolant Pump Relay Control (HP2)
12-13	-	-	Not Used
14	0.35 D-GN	5518	Auxiliary Inside Air Temperature Sensor Signal (C69)
15	0.35 L-BU/BK	590	Driver Sunload Sensor Signal
16	0.35 TN	516	Upper Left Air Temperature Sensor Signal
17	0.35 TN	517	Upper Right Air Temperature Sensor Signal
18	0.35 PK	2145	Air Temperature Switch Signal - Right (C69)
19	0.35 GY	2599	Auxiliary Mode Door Control (C69)
20	-	-	Not Used

Connector Part Information

Harness Type: Instrument Panel
OEM Connector: 13782501
Service Connector: 13578572
Description: 20-Way F USCAR 0.64 Series (BN)

Terminal Part Information

Terminated Lead: 13575550
Release Tool: J-38125-559
Diagnostic Test Probe: J-35616-16 (L-GN)
Terminal/Tray: 15445905/23
Core/Insulation Crimp: J/J