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: Data Link Connector (DLC) Resistor

Body Control Module (BCM) C1


Object Number: 1376257  Size: CH

Connector Part Information

  • OEM: 15393122
  • Service: 88987847
  • Description: 72-Way F Micro-64 Unsealed (BU with GY case)

Terminal Part Information

  • Pins: 8, 13-17, 19, 22, 26, 31, 35, 44, 47, 51, 53-57, 60-61
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
  • Pins: 33, 58
  • 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) C1

Pin

Wire Color

Circuit No.

Function

1-7

--

--

Not Used

8

WH

1080

Park Lamp Relay Control

9-12

--

--

Not Used

13

PK

849

Brake Fluid Level Sensor Signal

14

L-BU

1134

Park Brake Switch Signal

15

YE

5199

Run/Crank Relay Coil Control

16

WH

193

Rear Defog Relay Control

17

D-BU

15

Right Turn Signal Lamps Supply Voltage

18

--

--

Not Used

19

TN/WH

746

Right Front Door Ajar Switch Signal

20-21

--

--

Not Used

22

GY/BK

745

Left Front Door Ajar Switch Signal

23-25

--

--

Not Used

26

L-GN

1478

Coolant Level Switch Signal

27-30

--

--

Not Used

31

L-BU

20

Stop Lamp Supply Voltage

32

--

--

Not Used

33

D-GN/WH

1135

A/T Shift Lock Control Solenoid Supply Voltage (M82)

34

--

--

Not Used

35

L-BU

14

Left Turn Signal Lamps Supply Voltage

36-43

--

--

Not Used

44

TN/WH

1969

Headlamp High Beam Relay Control

45-46

--

--

Not Used

47

YE

196

Windshield Wiper Motor Park Switch Signal

48-50

--

--

Not Used

51

D-GN

113

Windshield Wiper Relay Control

52

--

--

Not Used

53

L-BU

20

Stop Lamp Supply Voltage

54

YE

317

Fog Lamp Relay Control

55

OG/BK

744

Rear Compartment Lid Ajar Switch Signal

56

OG/BK

737

Rear Compartment Lamp Control

57

BN

253

Trunk Release Relay Control

58

D-BU

38

Backup Lamp Relay Control

59

--

--

Not Used

60

TN

28

Horn Relay Control

61

BK/WH

651

Ground

62-72

--

--

Not Used

Body Control Module (BCM) C2


Object Number: 1376254  Size: CH

Connector Part Information

  • OEM: 15393121
  • Service: 88987848
  • Description: 72-Way F Micro-64 Unsealed (GY)

Terminal Part Information

  • Pins: 1-5, 9-12, 14-20, 26, 31, 33, 38, 44, 47, 51, 56-59, 61-62, 66-69, 71-72
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Body Control Module (BCM) C2

Pin

Wire Color

Circuit No.

Function

1

TN/BK

2500

High Speed GMLAN Serial Data Bus (+)

2

TN/BK

2500

High Speed GMLAN Serial Data Bus (+)

3

YE

10

Headlamp Switch Signal

4

PU

524

Headlamp Dimmer Switch High Beam Signal

5

BN/WH

301

Park Lamp Switch On Signal

6-8

--

--

Not Used

9

WH

111

Hazard Switch Signal

10

TN

1576

Rear Compartment Lock Actuator Unlock

11

D-GN

264

Security Indicator Supply Voltage

12

TN/WH

1455

Keyless Entry Program Enable Signal (AU0)

13

--

--

Not Used

14

TN

28

Horn Relay Control

15

WH

103

Headlamp Switch Headlamps On Signal

16

OG

192

Front Fog Lamp Switch Signal

17

PU/WH

549

Headlamp Switch Headlamps Off Signal

18

WH

5359

5-Volt Reference

19

TN

2501

High Speed GMLAN Serial Data Bus (-)

20

TN

2501

High Speed GMLAN Serial Data Bus (-)

21-25

--

--

Not Used

26

D-GN

44

Instrument Panel Lamp Dimmer Switch Signal

27-30

--

--

Not Used

31

YE

5361

Brake Pedal Position Sensor Signal

32

--

--

Not Used

33

YE

317

Fog Lamp Relay Control

34-37

--

--

Not Used

38

D-GN (Early)

5060

Low Speed GMLAN Serial Data

L-GN/BK (Late)

39-43

--

--

Not Used

44

L-GN/BK

1137

DRL Ambient Light Sensor Signal

45-46

--

--

Not Used

47

YE/BK

1138

DRL Ambient Light Sensor Low Reference

48-50

--

--

Not Used

51

BN

1356

Flash To Pass Switch Signal

52-55

--

--

Not Used

56

WH

1390

Off/Run/Crank Voltage

57

GY

112

Windshield Wiper Switch Low/Pulse Signal

58

PU

719

Low Reference

59

BN

5360

Low Reference

60

--

--

Not Used

61

GY

1884

Cruise Control Switch Signal

62

WH/BK

1073

Ignition Key Resistor Signal

63-65

--

--

Not Used

66

YE/BK

1418

Left Rear Turn Signal Switch Signal

67

D-GN/WH

1419

Right Rear Turn Signal Switch Signal

68

L-BU

292

Rear Defog Switch Signal

69

D-GN/WH

762

A/C Request Signal (C60)

70

--

--

Not Used

71

PU

5234

Passenger Seat Belt Indicator

72

WH

193

Rear Defogger Relay Control

Body Control Module (BCM) C3


Object Number: 1362564  Size: CH

Connector Part Information

  • OEM: 15492675
  • Service: 15404825
  • Description: 41-Way F Metri-Pack 280 800 Series (RD)

Terminal Part Information

  • Pins: A1, A3, A4, A5, A7, A9, A10, A12, B1, D4, B3, B5, C12, D7
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: Pins A1, A3, A4, A5, A7, A9, A10, A12, B1, D4 - E/A
  • Core/Insulation Crimp: Pins B3, B5, C12, D7 - E/C
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: C5, D1, D5, D6, D10, D12, D11
  • Terminal/Tray: 12110842/4
  • Core/Insulation Crimp: Pins C5, D1, D5, D6, D10, D12 - F/G
  • Core/Insulation Crimp: Pins D11 - A/B
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)

Body Control Module (BCM) C3

Pin

Wire Color

Circuit No.

Function

A1

TN

294

Door Lock Actuator Unlock Control (AU3)

A2

--

--

Not Used

A3

D-BU/WH

149

Courtesy Lamp Supply Voltage

A4

GY

295

Door Lock Actuator Lock Control (AU3)

A5

GY

295

Door Lock Actuator Lock Control (AU3)

A6

--

--

Not Used

A7

BN

9

Park Lamp Supply Voltage

A8

--

--

Not Used

A9

YE

18

Left Rear Stop/Turn Lamp Supply Voltage

A10

GY

157

Courtesy Lamp Control

A11

--

--

Not Used

A12

D-GN

19

Right Rear Stop/Turn Lamp Supply Voltage

B1

TN

694

Driver Door Lock Actuator Unlock Control (AU3)

B2

--

--

Not Used

B3

RD/WH

1240

Battery Positive Voltage

B4

--

--

Not Used

B5

BN

4

Accessory Voltage

B6-B7

--

--

Not Available

B8-B12

--

--

Not Used

C1-C2

--

--

Not Available

C3-C4

--

--

Not Used

C5

D-GN

801

RAP Fuse Supply Voltage

C6-C7

--

--

Not Available

C8-C11

--

--

Not Used

C12

OG

228

Windshield Washer Pump Control

D1

RD/BK

142

Battery Positive Voltage

D2-D3

--

--

Not Used

D4

RD/WH

840

Battery Positive Voltage

D5

D-GN

801

Retained Accessory Power Fuse Supply Voltage (AU3)

D6

PK

739

Ignition 1 Voltage

D7

PK

1339

Ignition 1 Voltage

D8-D9

--

--

Not Used

D10

RD/BK

442

Battery Positive Voltage

D11

RD/WH

640

Battery Positive Voltage (UQ3)

D12

RD/BK

242

Battery Positive Voltage

Body Control Module (BCM) C4


Object Number: 697044  Size: CH

Connector Part Information

  • OEM: 15492668
  • Service: 88988776
  • Description: 68-Way F Metri-Pack 280 Series, Flexlock (L-GY)

Terminal Part Information

  • Pins: F2, F4, F5, F6, F6
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: B1, C1, C8, D1, D3, E6, F1, F9, D10, D10
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: Pins B1, C1, C8, D1, D3, E6, F1, F9 - E/C
  • Core/Insulation Crimp: Pins D10- See Terminal Repair Kit
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: D4, E12
  • Terminal/Tray: 12110842/4
  • Core/Insulation Crimp: Pins D4 - F/G
  • Core/Insulation Crimp: Pins E12 - A/B
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)

Body Control Module (BCM) C4

Pin

Wire Color

Circuit No.

Function

A1-A12

--

--

Not Used

B1

OG

228

Windshield Washer Pump Control

B2-B12

--

--

Not Used

C1

RD/WH

1440

Battery Positive Voltage

C2-C5

--

--

Not Used

C6-C7

--

--

Not Available

C8

BN

4

Accessory Voltage

C9-C12

--

--

Not Used

D1

RD/WH

1040

Battery Positive Voltage

D2

--

--

Not Used

D3

YE

5199

Run/Crank Relay Coil Control

D4

BN

141

Ignition 3 Voltage

D5

--

--

Not Used

D6-D7

--

--

Not Available

D8-D9

--

--

Not Used

D10

RD/WH

1140

Battery Positive Voltage (UW5)

RD/WH

1140

Battery Positive Voltage (UQ3)

D11-D12

--

--

Not Used

E1-E5

--

--

Not Used

E6

PK

439

Ignition 1 Voltage

E7-E11

--

--

Not Used

E12

BK

550

Ground

F1

RD/WH

340

Battery Positive Voltage

F2

GY

8

Instrument Panel Lamp Supply Voltage

F3

--

--

Not Used

F4

PK

339

Ignition 1 Voltage

F5

PK

339

Ignition 1 Voltage

F6

PK

339

Ignition 1 Voltage (MA5)

PK

339

Ignition 1 Voltage (M82)

F7-F8

--

--

Not Used

F9

PK

1539

Ignition 1 Voltage

F10-F12

--

--

Not Used

Data Link Connector (DLC)


Object Number: 68793  Size: CH

Connector Part Information

  • OEM: 12110250
  • Service: Not Serviced
  • Description: 16-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Pins: 1, 4-6, 14, 16
  • Terminal/Tray: 12129484/19
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Data Link Connector (DLC)

Pin

Wire Color

Circuit No.

Function

1

D-GN

5060

Low Speed GMLAN Serial Data

2-3

--

--

Not Used

4

BK

550

Ground

5

BK/WH

651

Ground

6

TN/BK

2500

High Speed GMLAN Serial Data Bus (+)

7-13

--

--

Not Used

14

TN

2501

High Speed GMLAN Serial Data Bus (-)

15

--

--

Not Used

16

RD/WH

40

Battery Positive Voltage

Data Link Connector (DLC) Resistor


Object Number: 523630  Size: CH

Connector Part Information

  • OEM: 15326801
  • Service: 15306156
  • Description: 2-Way F GT 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12191819/8
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 15315247/J-35616-2A (GY)

Data Link Connector (DLC) Resistor

Pin

Wire Color

Circuit No.

Function

A

TN/BK

2500

High Speed GMLAN Serial Data Bus (+)

B

TN

2501

High Speed GMLAN Serial Data Bus (-)