WARNING: This page is about a different car, the 2007 Chevrolet Corvette. 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 Parts Information

Connector Part Information

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

Terminal Part Information

Pins: 1-7, 9, 11, 14-20, 22, 31, 49, 51, 57, 59, 61, 66-71
Terminal/Tray: 15359541/4
Core/Insulation Crimp: M/M
Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Body Control Module (BCM) C2 Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	TN/BK	2500	High Speed GMLAN Serial Data (+)
2	TN/BK	2500	High Speed GMLAN Serial Data (+)
3	PK/WH	1970	Headlamp Low Beam Relay Control
4	PU	524	Headlamp Dimmer Switch High Beam Signal
5	BN/WH	301	Park Lamp Switch On Signal
6	YE	1977	Rear Fog Lamp Relay Control (Export)
7	PK	5068	Intrusion Sensor Switch Disable Signal (Export)
8	-	-	Not Used
9	TN	2144	Hazard Switch Signal
10	-	-	Not Used
11	OG	5721	Ignition Mode Switch Off LED Signal
12-13	-	-	Not Used
14	TN	28	Horn Relay Control
15	WH	103	Headlamp Switch On Signal
16	OG	192	Front Fog Lamp Switch Signal
17	L-BU	1872	Park Lamp Switch Off Signal
18	GY	5381	Brake Position Sensor 5-Volt Reference
19	TN	2501	High Speed GMLAN Serial Data (-)
20	TN	2501	High Speed GMLAN Serial Data (-)
21	-	-	Not Used
22	L-BU	187	Rear Fog Lamp Switch Signal
23-30	-	-	Not Used
31	TN	5380	Brake Position Sensor Signal
32-48	-	-	Not Used
49	D-BN	75	Accessory Supply Voltage
50	-	-	Not Used
51	BN	1356	Flash To Pass Switch Signal
52-56	-	-	Not Used
57	L-BU	1714	Windshield Wiper Switch Low Signal
58	-	-	Not Used
59	BN	5382	Brake Position Sensor Low Reference
60	-	-	Not Used
61	GY	1884	Cruise Control Set/Coast/Resume/Accelerate Switch Signal
62-65	-	-	Not Used
66	L-BU/WH	1414	Left Front Turn Signal Switch Signal
67	D-BU/WH	1415	Right Front Turn Signal Switch Signal
68	BN/WH	1571	Traction Control Switch Signal
69	D-GN/WH	1932	Shift Select Switch Park Signal
70	GY/BK	896	Hard Top Connected Signal
71	L-GN	5720	Ignition Mode Switch Accessory LED Signal
72	-	-	Not Used

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

Rather have a pro handle this?