GM Service Manual Online
For 1990-2009 cars only
Table 1: BCM C1
Table 2: BCM C2
Table 3: BCM C3

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 Relay Output (Low Beam)

A2

DK GRN/WHT

1317

Fog Lamp Relay Output

A3-A7

--

--

Not Used

A8

PPL

1600

Fuse Output, Ignition 0 (Type III Fuse)

B1

WHT

1080

Park Lamp Relay Output

B2-B4

--

--

Not Used

B5

LT GRN/BLK

592

Daytime Running Lamp (DRL) Relay Output

B6

--

--

Not Used

B7

LT GRN/BLK

394

Door Handle Switch Signal, Left Front

B8

BRN

341

Fuse Output, Ignition 3 (Type III Fuse)

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

A4

BLK

470

Sensor Return

A5

PNK

1200

Headlamp Lamp Output (High Beam)

A6

BLK

1835

Passlock™ Signal Ground

A7

--

--

Not Used

A8

PPL

16

Turn Signal Flasher Input

A9

LT BLU

1134

Park Brake Switch Signal

A10-A12

--

--

Not Used

B1

ORN

1732

Inadvertent Power Control (12 V)

B2

LT GRN/BLK

1137

Ambient Light Sensor (5 V)

B3

--

--

Not Used

B4

DK BLU

1201

Headlamp Lamp Output (Low Beam)

B5

PPL

30

Fuel Gauge Sensor Signal

B6

YEL

1836

Passlock™ Sensor Signal

B7

LT BLU/BLK

1322

Serial Data SPI Data Receive

B8

BRN

9

Parklamp Feed

B9

PNK

439

Fuse Output, Ignition

B10

LT BLU

395

Door Handle Switch Signal, Right Front

B11

BLK/WHT

238

Seat Belt Switch Signal

B12

LT GRN

80

Key Reminder Switch Signal

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-A2

--

--

Not Used

A3

YEL

1321

Serial Data SPI Data Transmit

A4

ORN

192

Fog Lamp Switch Output, Front

A5

--

--

Not Used

A6

BLK/WHT

99

Windshield Washer Fluid Level Sensor Signal

A7

PNK/BLK

1323

Serial Data SPI Clock

A8-A9

--

--

Not Used

A10

BLK/WHT

451

Engine Control Module Ground

A11

WHT

156

Courtesy Lamp Output

A12

ORN

340

Fuse Output, Battery (Type III Fuse)

B1

ORN

1540

Fuse Output, Battery (Type III Fuse)

B2

PPL

1807

Serial Data Signal, Class B, 10400 Baud (Primary)

B3

--

--

Not Used

B4

WHT

1459

Passlock™ Battery Voltage

B5

--

--

Not Used

B6

YEL/BLK

68

Low Coolant Level Indicator Lamp Output

B7

LT GRN

66

A/C Request Input

B8-B9

--

--

Not Used

B10

BLK/WHT

451

Engine Control Module Ground

B11-B12

--

--

Not Used