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

Body Control Module (BCM) C1


Object Number: 73152  Size: CH

Connector Part Information

    • 12084945
    • 16-Way F Micro-Pack 100 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A1

PNK/WHT

1970

Headlamp Low Beam Relay Control

A2

DK GRN

/WHT

1317

Fog Lamp Relay Control (T96)

A3

GRY/BLK

308

Park Lamp Switch - On - Signal

A4

BLK

28

Horn Relay Control

A5-A7

--

--

Not Used

A8

PPL

1600

Ignition 0 Voltage

B1

WHT

1080

Park Lamp Relay Control

B2

--

--

Not Used

B3

LT BLU

1344

Trunk Release Relay Control

B4

--

--

Not Used

B5

LT GRN

/BLK

592

DRL Relay Control

B6

--

--

Not Used

B7

LT GRN

/BLK

394

Driver Door Ajar Switch Signal

B8

BRN

341

Ignition 3 Voltage

Body Control Module (BCM) C2


Object Number: 73156  Size: CH

Connector Part Information

    • 12110088
    • 24-Way F Micro-Pack 100 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

WHT

682

Door Lock Lock/Unlock Signal

A3

YEL/BLK

1138

DRL Ambient Light Sensor Low Reference

A4

--

--

Not Used

A5

PNK

1200

Headlamp High Beam Signal

A6

BLK

1835

Security System Sensor Low Reference

A7

BLK/WHT

1576

Trunk Release Switch Signal

A8

PPL

16

Turn Signal Flasher Signal

A9

LT BLU

1134

Park Brake Switch Signal

A10-A11

--

--

Not Used

A12

PNK

849

Brake Fluid Level Sensor Signal

B1

ORN

1732

Courtesy Lamps Supply Voltage

B2

LT GRN

/BLK

1137

DRL Ambient Light Sensor Signal

B3

--

--

Not Used

B4

DK BLU

1201

Headlamp Low Beam Signal

B5

--

--

Not Used

B6

YEL

1836

Security System Sensor Signal

B7

LT BLU

/BLK

1322

SPI Serial Data B

B8

BRN

9

Park Lamp Supply Voltage

B9

PNK

439

Ignition 1 Voltage

B10

LT BLU

395

Passenger Door Ajar Switch Signal

B11

BLK/WHT

238

Driver Seat Belt Switch Signal

B12

LT GRN

80

Key In Ignition Switch Signal

Body Control Module (BCM) C3


Object Number: 130689  Size: CH

Connector Part Information

    • 12110244
    • 24-Way F Micro-Pack 100 Series (PNK)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

YEL

356

Driver Door Lock Relay Unlock Control

A3

YEL

1321

SPI Serial Data A

A4

ORN

192

Front Fog Lamp Switch Signal (T96)

A5

--

--

Not Used

A6

BLK/WHT

99

Windshield Washer Fluid Level Signal

A7

PNK/BLK

1323

SPI Serial Data Clock

A8

LT BLU

195

Door Lock Control

A9

--

--

Not Used

A10

BLK/WHT

151

Ground

A11

WHT

156

Courtesy Lamp Low Control

A12

ORN

340

Battery Positive Voltage

B1

ORN

1540

Battery Positive Voltage

B2

PPL

1807

Class 2 Serial Data

B3

WHT

194

Door Unlock Control

B4

WHT

1459

Security System Sensor Supply Voltage

B5

--

--

Not Used

B6

YEL/BLK

68

Low Coolant Level Indicator Control

B7

LT GRN

66

A/C Request Signal

B8-B12

--

--

Not Used