GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (C1)
Table 2: Body Control Module (C2)
Table 3: Body Control Module (C3)

Body Control Module (C1)


Object Number: 255037  Size: CH

Connector Part Information

    • 12160778
    • 24-Way Female MIC/P 100 (BRN)

Pin

Wire Color

Circuit No.

Function

A1

BLK

1850

Ground

A2

ORN

1840

Fuse Output - Battery - Type 3

A3

WHT

194

Power Door Lock Relay Feed - Unlock Coil

A4

LT BLU

195

Power Door Lock Relay Feed - Lock Coil

A5-A6

--

--

Not Used

A7

BLK

755

Delayed Accessory Bus Relay - Output Coil - Accessory Relay

A8

DK BLU

1393

Interior Lamp Relay Output - Coil

A9

BLK

28

Horn Feed

A10

--

--

Not Used

A11

LT GRN/BLK

592

Daytime Running Lamp Relay Output - Coil

A12

LT GRN

1037

Class 2 Serial Data - BCM (Body Control Module)

B1

BLK

1850

Ground

B2

PNK

39

Fuse Output - Ignition 1 - Type 3

B3

RED/WHT

812

12 Volt Feed

B4

ORN

461

5 Volt Feed

B5

--

--

Not Used

B6

LT BLU

14

Turn Signal Lamp Feed - Left Front

B7

DK BLU

15

Turn Signal Lamp Feed - Right Front

B8

--

--

Not Used

B9

BRN

41

Fuse Output - Ignition 3 - Type 3

B10

LT BLU

1134

Park Brake Switch Signal

B11

BLK/WHT

238

Seat Belt Switch Signal

B12

LT BLU

553

Transmission Shift Select Switch Output - Performance

Body Control Module (C2)


Object Number: 130690  Size: CH

Connector Part Information

    • 12110206
    • 24-Way Female MIC/P 100 (LT BLU)

Pin

Wire Color

Circuit No.

Function

A1

YEL

710

Class 2 Serial Data Signal

A2

ORN/BLK

1057

Sensor Return

A3

GRY/BLK

690

Courtesy Lamp Relay Output - Coil

A4

LT GRN

1391

Power Door Lock Relay Output - Coil - Left Front

A5

WHT

1080

Park Lamp Relay Output - Coil

A6

LT BLU

1344

Trunk Release Relay Output - Coil

A7-A10

--

--

Interior Lamp Relay Output - Coil

A11

WHT

352

Headlamp Relay Feed - Coil

A12

PPL/WHT

1382

L.E.D. Dimming Signal

B1

DK GRN

817

Vehicle Speed Signal

B2

--

--

Not Used

B3

YEL

1836

Magnetic Rotation Detection Sendor Signal

B4

--

--

Not Used

B5

LT GRN/BLK

1311

High Beam Headlamp Feed - Monitored

B6

BRN

9

Park Lamp Feed

B7-B8

--

--

Not Used

B9

LT GRN

80

Key Reminder Switch Signal

B10

PNK

775

Liftgate Ajar Telltale Driver

B11

YEL

656

Door Ajar - 12 Volt Feed

B12

ORN

1732

12 Volt Inadvertent Feed

Body Control Module (C3)


Object Number: 362758  Size: CH

Connector Part Information

    • 12191375
    • 16-Way Female MIC/P 100 (PPL)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

DK BLU/WHT

1495

Courtesy Lamp Switch Output - Nornally Closed Contact

A3

YEL

307

Headlmap Switch Output - Flash to Pass

A4

GRY

605

5 Volt Reference

A5

GRY

8

Instrument Panel Lamp Feed

A6

WHT

278

Photocell Signal

A7-A8

--

--

Not Used

B1

--

--

Not Used

B2

ORN

54

Door Jamb Switch Signal - Passenger

B3

--

--

Not Used

B4

DK BLU

49

Door Jamb Switch Signal - Driver

B5

--

--

Not Used

B6

PPL

328

Interior Lamp Defeat Switch Output

B7

--

--

Not Used

B8

PPL/WHT

549

Headlamp Switch Signal - Headlamps Off