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
Table 5: Body Control Module (BCM) C5

Body Control Module (BCM) C1


Object Number: 40446  Size: CH

Connector Part Information

    • 12177194
    • 6-Way F Metri-Pack 150 Series (WH)

Pin

Wire Color

Circuit No.

Function

A

BN/WH

230

Instrument Panel Lamp Dimming Control

B

--

--

Not Used

C

OG

4040

Battery Positive Voltage

D

OG

1732

Electronic Control Unit 12-Volt Reference

E

BN/WH

230

Instrument Panel Lamp Dimming Control

F

OG

2240

Battery Positive Voltage

Body Control Module (BCM) C2


Object Number: 73156  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

Not Used

A2

WH

2283

Rear Wiper/Washer Switch Supply Voltage

A3

TN/BK

254

Door Unlock Control

A4

PK/WH

1970

Headlamp Low Beam Relay Control

A5

D-GN/WH

1317

Fog Lamp Relay Control

A6

GY/BK

255

Door Lock Control

A7

L-GN

1391

Left Front Door Lock Relay Control

A8-A10

Not Used

A11

RD/WH

812

12-Volt Reference

A12

OG

1140

Battery Positive Voltage

B1

BK/WH

1969

Headlamp High Beam Relay Control

B2

WH

1080

Park Lamp Relay Control

B3

Not Used

B4

L-GN/BK

592

DRL Relay Control

B5

Not Used

B6

BK/WH

751

Signal Ground

B7

BK

1835

Security System Sensor Low Reference

B8

Not Used

B9

BK

28

Horn Relay Control

B10

Not Used

B11

GY

705

5-Volt Reference

B12

L-GN

1037

BCM Class 2 Serial Data

Body Control Module (BCM) C3


Object Number: 255037  Size: CH

Connector Part Information

    • 12160778
    • 24-Way F Micro-Pack 100 Series (BN)

Pin

Wire Color

Circuit No.

Function

A1-A3

Not Used

A4

WH

278

Ambient Light Sensor Signal

A5

Not Used

A6

YE

1836

Security System Sensor Signal

A7

L-GN

1011

Remote Radio Control Signal

A8

L-BU

1134

Park Brake Switch Signal

A9

OG

192

Front Fog Lamp Switch Signal

A10

D-GN

113

Windshield Wiper Switch On Signal

A11-A12

--

--

Not Used

B1

YE

710

Class 2 Serial Data Secondary

B2

GY/BK

308

Park Lamp Switch On Signal

B3-B5

Not Used

B6

BK/WH

751

Signal Ground

B7

--

--

Not Used

B8

OG/BK

2090

Combined Vehicle Inertial Sensor Low Reference

B9

L-GN

11

Headlamp High Beam Supply Voltage

B10-B12

Not Used

Body Control Module (BCM) C4


Object Number: 130690  Size: CH

Connector Part Information

    • 12110206
    • 24-Way F Micro-Pack 100 Series (L-BU)

Pin

Wire Color

Circuit No.

Function

A1

L-GN

80

Key In Ignition Switch Signal

A2

YE

307

Headlamp Switch Flash To Pass Signal

A3

PK

1390

Off/Run/Crank Voltage

A4

PK

39

Run/Crank Ignition 1 Voltage

A5

BK/WH

746

Right Front Door Ajar Switch Signal

A6

Not Used

A7

L-BU

1134

Park Brake Switch Signal

A8-A11

Not Used

A12

WH

103

Headlamp Switch On Signal

B1-B2

Not Used

B3

YE

343

Accessory Voltage

B4

GY/BK

745

Left Front Door Ajar Switch Signal

B5

L-BU

195

Door Lock Control

B6

GY/BK

2226

Vehicle Speed Sensor Low Reference

B7

BK

279

Ambient Light Sensor Low Reference

B8-B9

Not Used

B10

WH

194

Door Unlock Control

B11-B12

Not Used

Body Control Module (BCM) C5


Object Number: 304345  Size: CH

Connector Part Information

    • 12177195
    • 6-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A-C

Not Used

D

OG

2140

Battery Positive Voltage

E

GY/BK

690

Courtesy Lamp Relay Control

F

L-GN

24

Backup Lamp Supply Voltage