WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Body Control Module (BCM) C2 Connector End View

Courtesy of GENERAL MOTORS CORP.

Body Control Module (BCM) C2 Connector & Terminal Parts Information

Connector Part Information

OEM: 15393121
Service: 88987848
Description: 72-Way F Micro 64 (GY)

Terminal Part Information

Pins: 1-5, 9, 10-12, 14-17, 19, 20, 26, 38, 44, 47, 51, 54-58, 61, 62, 66-69, 72
Terminal/Tray: 15359541/4
Core/Insulation Crimp: M/M
Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Pins: 70
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit

Body Control Module (BCM) C2 Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	BN/WH	2500	High Speed GMLAN Serial Data (+)
2	TN/BK	2500	High Speed GMLAN Serial Data (+)
3	YE	10	Headlamp Switch Signal
4	PU	524	Headlamp Dimmer Switch High Beam Signal
5	BN/WH	301	Park Lamp Switch On Signal
6-8	-	-	Not Used
9	WH	111	Hazard Switch Signal
10	TN	1576	Rear Compartment Lid Release Switch
11	D-GN	264	Security Indicator Supply Voltage
12-13	-	-	Not Used
14	TN	28	Horn Relay Control
15	WH	103	Headlamp Switch Headlamps On Signal
16	OG	192	Front Fog Lamp Switch Signal (T37)
17	PU/WH	549	Headlamp Switch Headlamps Off Signal
18	-	-	Not Used
19	BN	2501	High Speed GMLAN Serial Data (-)
20	TN	2501	High Speed GMLAN Serial Data (-)
21-25	-	-	Not Used
26	D-GN	44	Instrument Panel Lamp Dimmer Switch Signal
27-37	-	-	Not Used
38	D-GN	5060	Low Speed GMLAN Serial Data
39-43	-	-	Not Used
44	L-GN/BK	1137	DRL Ambient Light Sensor Signal
45-46	-	-	Not Used
47	YE/BK	1138	DRL Ambient Light Sensor Low Reference
48-50	-	-	Not Used
51	BN	1356	Flash To Pass Switch Signal
52-53	-	-	Not Used
54	L-BU	20	Stop Lamp Supply Voltage
55	-	-	Not Used
56	WH	1390	Off/Run/Crank Voltage
57	GY	112	Windshield Wiper Switch Signal
58	PU	719	Low Reference
59-60	-	-	Not Used
61	GY	1884	Cruise Control Switch Signal
62	WH/BK	1073	Ignition Key Resistor Signal
63-65	-	-	Not Used
66	YE/BK	1418	Left Rear Turn Signal Switch Signal
67	D-GN/WH	1419	Right Rear Turn Signal Switch Signal
68	L-BU	292	Rear Defog Switch Signal
69	L-GN	66	A/C Request Signal
70	-	-	Not Used
71	PU	5234	Passenger Seatbelt Reminder
72	WH	193	Rear Defog Relay Control

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Body Control Module (BCM) C2

Use the Manual With the Right Hardware

When to See a Mechanic

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