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
Table 4: Body Control Module (BCM) C4

Body Control Module (BCM) C1


Object Number: 73152  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit Number

Function

A1

--

--

Not Used

A2

L-GN

1391

Driver Door Unlock Relay Control

A3

L-BU

195

Door Lock Relay Control

A4

WH

194

Door Unlock Relay Control

A5-A6

--

--

Not Used

A7

OG/BK

781

Driver Door Lock Switch Unlock Signal

A8

RD/BK

780

Driver Door Lock Switch Lock Signal

B1

--

--

Not Used

B2

D-BU

1201

Headlamp Low Beam Signal

B3

--

--

Not Used

B4

GY

731

EVAP Temperature Sensor Signal

B5-B7

--

--

Not Used

B8

L-GN

66

A/C Request Signal

Body Control Module (BCM) C2


Object Number: 73156  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit Number

Function

A1

--

--

Not Used

A2

L-BU

1134

Park Brake Switch Signal

A3

PK

1200

Headlamp High Beam Signal

A4

WH

1579

Oil Life Reset Switch Signal

A5

PU

333

Brake Fluid Level Switch Signal

A6

BN

96

Windshield Wiper Switch Pulse Delay Signal

A7

--

--

Not Used

A8

PK

94

Windshield Washer Switch Signal

A9

RD

228

Windshield Washer Pump Control

A10

PK

339

Ignition 1 Voltage

A11

L-GN

80

Key In Ignition Switch Signal

A12

BK/WH

746

Passenger Doors Ajar Switch Signal

B1

YE

749

Security Indicator Control

B2

GY/BK

745

Left Front Door Ajar Switch Signal

B3

L-BU

292

Rear Defog Switch Signal

B4

RD/BK

744

Liftgate Ajar Switch Signal

B5

D-GN

392

Rear Window Washer Switch Signal

B6

--

--

Not Used

B7

OG

192

Fog Lamp Switch Signal (w/ Fog Lamps)

B8

--

--

Not Used

B9

YE

743

Accessory Voltage

B10

BN

9

Park Lamp Supply Voltage

B11

L-GN

1478

Coolant Level Switch Signal

B12

PU

719

Low Reference

Body Control Module (BCM) C3


Object Number: 130689  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit Number

Function

A1

WH

156

Dome Lamp Control

A2

RD/WH

812

12 Volt Reference

A3

--

--

Not Used

A4

YE

317

Fog Lamp Relay Control (w/ Fog Lamps)

A5

OG/BK

1445

BCM Program Enable Signal

A6

RD

2445

Rear Wiper Relay Control

A7

--

--

Not Used

A8

L-GN/BK

592

DRL Relay Control

A9

BN/WH

230

I/P Lamps Dimming Control

A10

PU

1807

Class 2 Serial Data

A11

--

--

Not Used

A12

TN

2501

CAN Low

B1

TN/WH

816

A/T Shift Lock Switch Signal

B2

BK

28

Horn Relay Control

B3

OG/BK

1057

Low Reference

B4

GY

112

Windshield Wiper Switch Signal 1

B5

TN

470

Low Reference

B6

WH

193

Rear Defog Relay Control

B7

YE

1836

Security System Sensor Signal

B8

D-GN

113

Windshield Wiper Switch Signal 2

B9

PU

1807

Class 2 Serial Data

B10

PU

1807

Class 2 Serial Data

B11

--

--

Not Used

B12

TN/WH

2500

CAN High

Body Control Module (BCM) C4


Object Number: 73158  Size: CH

Connector Part Information

    • 12110626
    • 8-Way F Metri-Pack 280 Series (GY)

Pin

Wire Color

Circuit Number

Function

A

OG

1732

Courtesy Lamps Supply Voltage

B-C

--

--

Not Used

D

OG

2540

Battery Positive Voltage

E

GY

8

I/P Lamps Dimmer Switch Signal

F

BK/WH

151

Ground

G

--

--

Not Used

H

OG

1640

Battery Positive Voltage