GM Service Manual Online
For 1990-2009 cars only
Connector 1: Body Control Module (BCM) C0
Connector 2: Body Control Module (BCM) C1
Connector 3: Body Control Module (BCM) C2
Connector 4: Body Control Module (BCM) C3
Connector 5: Data Link Connector (DLC)

Body Control Module (BCM) C0


Object Number: 73152  Size: CH

Connector Part Information

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

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Body Control Module (BCM) C0

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

PK/BK

1597

Interior Lamp Switch On Signal

A3

YE

10

Headlamp Switch Signal

A4

PU

328

Interior Lamp Defeat Switch Signal

A5

L-GN

80

Key In Ignition Switch Signal

A6

L-BU

13

Headlamp Switch Park Lamps Signal

A7

OG

192

Fog Lamp Switch Signal

A8

--

--

Not Used

B1

WH/BK

1221

Liftgate Release Switch Signal

B2-B3

--

--

Not Used

B4

YE

443

Accessory Voltage

B5

PU

1500

Ignition 0 Voltage

B6

--

--

Not Used

B7

BN/WH

1571

Traction Control Switch Signal

B8

D-GN

389

Vehicle Speed Signal

Body Control Module (BCM) C1


Object Number: 73156  Size: CH

Connector Part Information

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

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Body Control Module (BCM) C1

Pin

Wire Color

Circuit No.

Function

A1

BK

1550

Ground

A2-A3

--

--

Not Used

A4

YE/BK

1138

Low Reference

A5

PK

1444

5-Volt Reference

A6

L-GN/BK

1137

DRL Ambient Light Sensor Signal

A7

BN/WH

230

Instrument Panel Lamps Dimming Control

A8

L-GN/BK

311

High Beam Signal

A9

BK/WH

1455

Keyless Entry Signal

A10

L-GN

1037

Class 2 Serial Data

A11

BK

28

Horn Relay Coil Control

A12

L-GN/BK

592

DRL Relay Control

B1

GY/BK

1798

Low Reference

B2

PK

739

Ignition 1 Voltage

B3

BN

9

Park Lamps Supply Voltage

B4

YE

749

Security Indicator Control

B5-B6

--

--

Not Used

B7

OG

3240

Battery Positive Voltage

B8

L-BU

910

Headlamp High/Low Beam Relay Control

B9

D-GN/WH

762

A/C Request Signal (C60 or CJ3)

B10

--

--

Not Used

B11

TN/WH

816

A/T Shift Lock Solenoid Control

B12

D-GN/WH

1317

Fog Lamp Relay Control

Body Control Module (BCM) C2


Object Number: 130689  Size: CH

Connector Part Information

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

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Body Control Module (BCM) C2

Pin

Wire Color

Circuit No.

Function

A1

OG/BK

233

Park Brake Switch Signal

A2

OG

54

Front Passenger Door Open Switch Signal

A3

D- BU/WH

727

Door Ajar Switch Signal

A4

PU

1124

Door Lock Key Switch Unlock Signal

A5-A6

--

--

Not Used

A7

D-BU

49

Driver Door Open Switch Signal

A8

L-BU

2380

Rear Parking Assist Chime Signal (UD7)

A9

PK/BK

1303

Liftgate Ajar Switch Signal

A10

YE

656

Liftgate Open Switch Signal

A11-A12

--

--

Not Used

B1

BK

775

Rear Door Open Switch Signal

B2-B3

--

--

Not Used

B4

RD/BK

780

Door Lock Switch Signal

B5-B12

--

--

Not Used

Body Control Module (BCM) C3


Object Number: 798865  Size: CH

Connector Part Information

  • OEM: Not Applicable
  • Service: 12110244
  • Description: 24-Way BCM to Fuse Block - Center Console Connector

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Body Control Module (BCM) C3

Pin

Wire Color

Circuit No.

Function

1

--

340

Battery Positive Voltage

2

--

1080

Park Lamp Relay Control

3

--

--

Not Used

4

--

999

Backup Lamp Relay Control

5

--

--

Not Used

6

--

2440

Battery Positive Voltage

7

--

--

Not Used

8

--

383

Trunk Release Control

9

--

1732

Courtesy Lamps Supply Voltage

10

--

240

Battery Positive Voltage

11

--

8

Instrument Panel Lamps Supply Voltage

12

--

690

Courtesy Lamps Low Control

13

--

9295

Liftgate Lock Motor Lock Control

14

--

9294

Liftgate Lock Motor Unlock Control

15

--

550

Ground

16

--

294

Door Lock Actuator Unlock Control

17

--

694

Driver Door Lock Actuator Unlock Control

18

--

295

Door Lock Actuator Lock Control

19

--

--

Not Used

20

--

707

RAP Relay Coil Control

21

--

911

Rear Defog Relay Coil Supply Voltage

22-23

--

--

Not Used

24

--

150

Ground

Data Link Connector (DLC)


Object Number: 68793  Size: CH

Connector Part Information

  • OEM: 12110250
  • Service: 12110250
  • Description: 16-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12129484/19
  • Core/Insulation Crimp: Pins 2, 4, 5, 6, 14: E/C
  • Core/Insulation Crimp: Pin 16: E/A
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Data Link Connector (DLC)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PU

1132

Class 2 Serial Data

3

--

--

Not Used

4

BK

1450

Ground

5

BK

1550

Ground

6-15

--

--

Not Used

16

OG

2740

Battery Positive Voltage