Body Control Module (BCM) X3

WARNING: This page is about a different car, the 2016 Chevrolet Impala Limited. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Body Control Module (BCM) X3 Connector End View

Courtesy of GENERAL MOTORS COMPANY

Pin	Wire	Circuit	Function
1	0.8 BK/WH	1551	Ground
2	0.8 RD/WH	1640	Battery Positive Voltage
3	0.5 RD/WH	1040	Battery Positive Voltage
4	-	-	Not Used
5	0.8 BK/WH	1551	Ground
6-7	-	-	Not Used
8	0.35 TN/BK	2500	High Speed GMLAN Serial Data Bus +
9	0.35 TN	2501	High Speed GMLAN Serial Data Bus -
10	0.35 L-GN/BK	5060	Low Speed GMLAN Serial Data
11	0.35 D-GN	44	Instrument Panel Lamps Dimmer Switch Signal
12	0.35 OG/WH	812	I/P Dimming Voltage Reference
13	0.35 L-GN	526	Stop Lamp Switch Signal
14	0.35 TN	552	Low Reference
15	0.35 GY	598	5-Volt Reference
16	0.35 TN/BK	2500	High Speed GMLAN Serial Data Bus +
17	0.35 TN	2501	High Speed GMLAN Serial Data Bus -
18	0.35 PU/WH	1382	LED Dimming Supply
19	0.35 L-BU	5986	Serial Data Communication Enable
20	-	-	Not Used
21	0.35 OG	192	Front Fog Lamp Switch Signal (T96)
21	0.5 D-BU/YE	6841	Rear Lamp Flasher Signal (9C1, 9C3)
22	0.35 D-GN/WH	7158	Cruise Control Indicator Dimming Signal
23-25	-	-	Not Used

Connector Part Information

Harness Type: Instrument Panel
OEM Connector: 15482791
Service Connector: 88988840
Description: 25-Way F HIT Series (L-BU)

Terminal Part Information

Pins: 1-3, 5
Terminated Lead: 13327199
Release Tool: J-38125-12A
Diagnostic Test Probe: J-35616-35 (VT)
Terminal/Tray: SNAC-A061T-M2.8/20
Core/Insulation Crimp: E/A

Pins: 8-22
Terminated Lead: 13575870
Release Tool: J-38125-12A
Diagnostic Test Probe: J-35616-64B (L-BU)
Terminal/Tray: SNAC3-A021T-M0.64/20
Core/Insulation Crimp: J/J