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

ALC Headlamp Relay Control

A2

DK GRN/WHT

1317

Fog Lamp Relay Control

A3

--

--

Not Used

A4

BLK

28

Horn Relay Control

A5

--

--

Not Used

A6

LT GRN

377

RFA Module Data

A7

--

--

Not Used

A8

PPL

1600

Fused Output, Ignition 0

B1

WHT

1080

ALC Park Lamp Relay Control

B2

--

--

Not Used

B3

LT BLU

1344

Rear Compartment Release Relay Control

B4

--

--

Not Used

B5

LT GRN/BLK

592

Daytime Running Lamp (DRL) Relay Control

B6

--

--

Not Used

B7

LT GRN/BLK

394

Door Switch Signal, Left Front

B8

BRN

341

Fused Output, Ignition 3

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-A2

--

--

Not Used

A3

YEL/BLK

1138

Ambient Light Sensor Signal Return

A4

--

--

Not Used

A5

PNK

1200

Headlamp Input (High Beam)

A6

BLK

1835

Passlock™ Signal Return

A7

BLK/RED

1576

Rear Compartment Release Switch Input

A8

PPL

16

Turn Signal Flasher Input

A9

LT BLU

1134

Park Brake Switch Signal

A10-A11

--

--

Not Used

A12

PNK

849

Brake Fluid Level Switch Input

B1

ORN

1732

Inadvertent Power Control (12 V)

B2

LT GRN/BLK

1137

Ambient Light Sensor Signal

B3

--

--

Not Used

B4

DK BLU

1201

Headlamp Input (Low Beam)

B5

--

--

Not Used

B6

YEL

1836

Passlock™ Sensor Signal

B7

LT BLU/BLK

1322

Serial Data SPI Data Receive

B8

BRN

9

Parklamp Input

B9

PNK

439

Fused Output, Ignition 1

B10

LT BLU

395

Door Switch Signal, Right Front

B11

BLK/WHT

238

Seat Belt Switch Signal

B12

LT GRN

80

Key Reminder 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 Unlock Relay Control

A3

YEL

1321

Serial Data SPI Data Transmit

A4

ORN

192

Fog Lamp Switch Input

A5

--

--

Not Used

A6

BLK/WHT

99

Windshield Washer Fluid Level Sensor Signal

A7

PNK/BLK

1323

Serial Data SPI Clock

A8

LT BLU

195

All Door Lock Relay Control

A9

--

--

Not Used

A10

BLK/WHT

151

Ground

A11

WHT

156

Courtesy Lamp Control

A12

ORN

340

Fused Output, Battery

B1

ORN

1540

Fused Output, Battery

B2

PPL

1807

Serial Data Signal, Class 2

B3

WHT

194

All Door Unlock Relay Control

B4

WHT

1459

Passlock™ Battery Voltage

B5

--

--

Not Used

B6

YEL/BLK

68

Low Coolant Level Switch Input

B7

LT GRN

66

A/C Request Input

B8-B12

--

--

Not Used