GM Service Manual Online
For 1990-2009 cars only
Connector 1: Body Control Module (BCM) C1
Connector 2: Body Control Module (BCM) C2
Connector 3: Body Control Module (BCM) C3
Connector 4: Body Control Module (BCM) C4
Connector 5: Data Link Connector (DLC)
Connector 6: Splice Pack SP200

Body Control Module (BCM) C1


Object Number: 73152  Size: CH

Connector Part Information

  • OEM: 12084945
  • Service: 12084945
  • Description: 16-Way F Micro-Pack 100 Series (GY)

Body Control Module (BCM) C1

Pin

Wire Color

Circuit No.

Function

A1

L-GN

1391

Driver Door Lock Relay Control

A2

L-BU

195

Door Lock Relay Control

A3

WH

194

Door Unlock Relay Control

A4

PU/WH

5981

PRNDL A Signal

A5

PK/BK

5982

PRNDL B Signal

A6

OG/BK

5983

PRNDL C Signal

A7

L-GN/WH

5984

PRNDL P Signal

A8

YE

1836

Security System Sensor Signal

B1

D-BU

1201

Headlamp Low Beam Signal

B2

GY

731

Evaporator Temperature Sensor Signal

B3

PU

719

Evaporator Temperature Sensor Low Reference

B4

YE/BK

1138

DRL Ambient Light Sensor Low Reference

B5

L-GN/BK

1137

DRL Ambient Light Sensor Signal

B6

BN/WH

230

Instrument Panel Lamp Dimming Control

B7

TN

470

Low Reference

B8

OG/BK

1057

Low Reference

Body Control Module (BCM) C2


Object Number: 73156  Size: CH

Connector Part Information

  • OEM: 12110088
  • Service: See Catalog
  • Description: 24-Way F Micro-Pack 100 Series (GY)

Body Control Module (BCM) C2

Pin

Wire Color

Circuit No.

Function

A1

PU

1807

Class 2 Serial Data

A2

BN

96

Windshield Wiper Switch Pulse Delay Signal

A3

D-BU

245

Passenger Door Lock Switch Unlock Supply Voltage

A4

BN/WH

1571

Traction Control Switch Signal (JM4 W/Traction Control)

A5

PK

94

Rear Window Wiper Switch Signal

A6

OG

228

Windshield Washer Pump Control

A7

PK

339

Ignition 1 Voltage

A8

L-GN

80

Key In Ignition Switch Signal

A9

--

--

Not Used

A10

TN/BK

2500

High Speed GMLAN Serial Data (+)

A11

TN

2501

High Speed GMLAN Serial Data (-)

A12

D-GN

113

Windshield Wiper Switch Signal 2

B1-B2

--

--

Not Used

B3

L-BU

74

Park Lamp Switch Signal

B4

OG

192

Fog Lamp Switch Signal (T96)

B5

TN/WH

746

Passenger Door Ajar Switch Signal

B6

YE

43

Accessory Voltage

B7

BN

9

Park Lamp Supply Voltage

B8

BN

41

Ignition 3 Voltage

B9

D-GN

392

Rear Window Washer Pump Control

B10

TN/BK

2500

High Speed GMLAN Serial Data (+)

B11

TN

2501

High Speed GMLAN Serial Data (-)

B12

GY

112

Windshield Wiper Switch Signal 1

Body Control Module (BCM) C3


Object Number: 130689  Size: CH

Connector Part Information

  • OEM: 12110244
  • Service: 12110244
  • Description: 24-Way F Micro-Pack 100 Series (PK)

Body Control Module (BCM) C3

Pin

Wire Color

Circuit No.

Function

A1

OG/WH

812

12-Volt Reference

A2

WH

1080

Park Lamp Relay Control

A3

TN

28

Horn Relay Control

A4

TN/WH

816

A/T Shift Lock Solenoid Control

A5

WH

352

Headlamp Relay Control

A6

OG/BK

6848

Front Wiper Relay Control

A7

--

--

Not Used

A8

L-GN/BK

592

DRL Relay Control

A9

YE

317

Fog Lamp Relay Control (T96)

A10

YE

749

Security Indicator Control

A11

YE

5420

Rear Wiper Relay Control

A12

WH

193

Rear Defog Relay Control

B1

WH

156

Dome Lamp Control

B2-B3

--

--

Not Used

B4

L-BU

244

Passenger Door Lock Switch Lock Supply Voltage

B5

L-BU

1134

Park Brake Switch Signal

B6

L-GN

66

A/C Request Signal

B7

L-BU

292

Rear Defog Switch Signal

B8

GY/BK

745

Left Front Door Ajar Switch Signal

B9

PK

1200

Headlamp High Beam Signal

B10

PU

333

Brake Fluid Level Switch Signal

B11

--

--

Not Used

B12

OG/BK

744

Liftgate Ajar Switch Signal

Body Control Module (BCM) C4


Object Number: 73158  Size: CH

Connector Part Information

  • OEM: 12110626
  • Service: 12110626
  • Description: 8-Way F Metri-Pack 280 Series, Flexlock (GY)

Body Control Module (BCM) C4

Pin

Wire Color

Circuit No.

Function

A

OG

1732

Courtesy Lamp Supply Voltage

B-D

--

--

Not Used

E

GY

8

I/P Lamps Dimmer Switch Signal

F

RD/WH

2540

Battery Positive Voltage

G

BK/WH

151

Ground

H

RD/WH

1640

Battery Positive Voltage

Data Link Connector (DLC)


Object Number: 68793  Size: CH

Connector Part Information

  • OEM: 348822-2
  • Service: 89046778
  • Description: 16-Way F Diagnostic Connector (BK)

Data Link Connector (DLC)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PU

1807

Class 2 Serial Data

3

--

--

Not Used

4

BK

550

Ground

5

BK/WH

151

Ground

6

TN/BK

2500

High Speed GMLAN Serial Data (+)

7-13

--

--

Not Used

14

TN

2501

High Speed GMLAN Serial Data (-)

15

--

--

Not Used

16

RD/WH

340

Battery Positive Voltage

Splice Pack SP200


Object Number: 831366  Size: CH

Connector Part Information

  • OEM: 15305291
  • Service: 15305291
  • Description: 12-Way F M/P 280 Splice Saver SGL (BK)

Splice Pack SP200

Pin

Wire Color

Circuit No.

Function

A-C

PU

1807

Class 2 Serial Data

D

--

--

Class 2 Serial Data - Not Used

E

PU

1807

Class 2 Serial Data

F

PU

1807

Class 2 Serial Data (U65)

G

PU

1807

Class 2 Serial Data

H-K

--

--

Class 2 Serial Data - Not Used

L

PU

1807

Class 2 Serial Data (U2K)

M

PU

1807

Class 2 Serial Data (UE1)