GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM) C1


Object Number: 884748  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 Control

A4

WH

194

Door Unlock Relay Coil Supply Voltage

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

PK

1200

Headlamp High Beam Ground

B3

--

--

Not Used

B4

L-BU

74

Park Lamp Switch Signal

B5

--

--

Not Used

B6

L-GN/BK

1137

DRL Ambient Light Sensor Signal

B7

YE/BK

1138

DRL Ambient Light Sensor Low Reference

B8

L-GN

66

A/C Request Signal

Body Control Module (BCM) C2


Object Number: 885478  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit Number

Function

A1

L-GN

867

ABS Indicator Failure Control

A2

L-BU

1134

Park Brake Switch Signal

A3

D-BU

1201

Headlamp Low Beam Ground

A4

WH

1579

Oil Life Reset Switch Signal

A5

PU

333

Brake Fluid Level Sensor Signal

A6

BN

96

Windshield Wiper Switch Pulse Delay Signal

A7

L-BU

832

Traction Control Active Signal

A8

PK

94

Rear Wiper Switch Signal

A9

RD

228

Windshield Washer Pump Signal

A10

PK

339

Ignition 1 Voltage

A11

L-GN

80

Key In Ignition Switch Signal

A12

BK/WH

746

Right Front Door Ajar Switch Signal

B1

D-GN

264

Security Indicator Supply Voltage

B2

GY/BK

745

Left Front Door Ajar Switch Signal

B3

L-BU

292

Rear Defog Switch Signal

B4

RD/BK

744

Rear Compartment Lid Adjar Switch

B5

D-GN

392

Rear Window Washer Switch Signal

B6

WH

2192

Traction Ready Indicator Control

B7

BK/WH

56

Trunk/Liftgate Release Switch Signal

B8

BK/WH

99

Windshield Washer Fluid Level Signal

B9

YE

743

Accessory Voltage

B10

BN

9

Park Lamp Supply Voltage

B11

L-GN

1478

Coolant Level Switch Signal

B12

--

--

Not Used

Body Control Module (BCM) C3


Object Number: 887943  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit Number

Function

A1

WH

156

Courtesy Lamp Low Control

A2

RD/WH

812

12 Volt Reference

A3

WH

352

Headlamp Relay Coil Supply Voltage

A4

D-BU

1660

Traction Control Indicator Control

A5

OG/BK

1445

BCM Program Enable Signal

A6

OG/BK

1445

BCM Program Enable Signal

A7

WH

1080

Park Lamp Relay Control

A8

L-GN/BK

592

DRL Relay Control

A9

GY

1359

LCD Backlighting Lamp Control

A10

PU

1807

Class 2 Serial Data

A11

--

--

Not Used

A12

TN

2501

High Speed GMLAN Serial Data Bus-

B1

TN/WH

816

A/T Shift Lock Solenoid Supply Voltage

B2

BK

28

Horn Relay Control

B3

OG/BK

1057

Low Reference

B4

GY

112

Windshield Wiper Switch Signal 1

B5

GY/BK

1381

LCD Dimming Signal

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

TN/WH

2500

High Speed GMLAN Serial Data Bus+

B12

--

--

Not Used

Body Control Module (BCM) C4


Object Number: 887949  Size: CH

Connector Part Information

    • 12110626
    • 8 Way Metri-Pack 280 Series (L-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

Instrument Panel Lamp Supply Voltage

F

BK

550

Ground

G

GY

382

Trunk Release Enable Relay Switch Supply Voltage

H

OG

1640

Battery Positive Voltage