Body Control Module (BCM) X1

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: Body Control Module (BCM) X1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire Color	Circuit	Function
1	-	-	Not Used
2	0.35 PK	1020	Ignition Voltage
3	0.35 GY	1884	Cruise Control Switch Signal
4	0.35 WH	530	5-Volt Reference
5	0.35 L-GN	1715	Windshield Wiper Switch High Signal
6	0.35 L-GN	6818	Steering Wheel Control Switch Signal
7	-	-	Not Used
8	0.35 TN/BK	6009	Low Reference
9	0.35 L-BU	1714	Windshield Wiper Switch Low Signal
10-13	-	-	Not Used
14	0.35 PK	3	Ignition Voltage
15	0.35 D-GN	663	Hazard Switch Left Turn Signal
16	0.35 TN	664	Hazard Switch Right Turn Signal
17	0.35 PK	1444	12-Volt Reference
18	0.35 YE	525	Headlamp Dimmer Switch Signal
19	0.35 WH	111	Hazard Switch Signal
20	0.35 PU	5526	Tap Up/Tap Down Switch Signal (MYC)
21	0.35 BN	4	Ignition Voltage
22	-	-	Not Used
23	0.35 L-BU	553	Tow/Haul Switch Signal
24	0.35 PK	94	Windshield Washer Switch Signal
25	0.35 YE	307	Headlamp Flash to Pass Signal
26	0.35 TN/WH	816	A/T Shift Lock Solenoid Control
27	-	-	Not Used

Connector Part Information

OEM: 15482789
Service: 88988838
Description: 27-Way F Receptacle 0.64 2.8 (L-GN)

Terminal Part Information

Terminal/Tray: SNAC3-A021T-M0.64/20
Core/Insulation Crimp: J/J
Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)