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)

Body Control Module (BCM) C1


Object Number: 1376257  Size: CH

Connector Part Information

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

Terminal Part Information

  • Pins: 2, 4, 7, 12-19, 22, 29, 33, 35, 38, 40, 42, 44, 47, 49, 51, 53, 55-57, 60, 63-66, 68-71
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Body Control Module (BCM) C1

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

YE

5058

Intrusion Sensor Armed Signal (UA2)

3

--

--

Not Used

4

D-BU

2167

Folding Top Cover Ajar Switch Supply Voltage (CM7)

5-6

--

--

Not Used

7

L-GN

5724

Ignition Mode Switch Mode Control

8-11

--

--

Not Used

12

BK/WH

851

Signal Ground

13

TN

28

Horn Relay Control

14

D-BU

5719

Ignition Mode Switch Start LED Signal

15

WH

5741

Steering Column Lock Module Lock Enable Relay Control (Export)

16

L-BU

1344

Trunk Release Relay Control

17

D-GN

1399

Accessory Voltage Signal (CM7)

18

OG/BK

744

Trunk Ajar Switch Signal

19

D-GN/WH

1317

Fog Lamp Relay Control

20-21

--

--

Not Used

22

YE

43

Accessory Voltage

23-28

--

--

Not Used

29

TN/WH

1969

Headlamp High Beam Relay Control

30-32

--

--

Not Used

33

L-GN

2166

Folding Top Cover Release Switch Supply Voltage (Y67 w/o CM7)

34

--

--

Not Used

35

TN

305

Trunk Key Switch Signal

36-37

--

--

Not Used

38

L-BU/WH

1314

Left Front Turn Signal Lamp Supply Voltage

39

--

--

Not Used

40

GY

91

Windshield Wiper Switch Signal 2

41

--

--

Not Used

42

GY

2169

Convertible Top Relay Cover Release Control (CM7)

43

--

--

Not Used

44

TN

126

Left Front Door Open Switch Signal

45-46

--

--

Not Used

47

OG/BK

737

Rear Compartment Lamp Control (Y67 w/CM7)

48

--

--

Not Used

49

PU

5059

Intrusion Sensor Alarm On Signal (UA2)

50

--

--

Not Used

51

GY/BK

745

Left Front Door Ajar Switch Signal

52

--

--

Not Used

53

TN/WH

746

Right Front Door Ajar Switch Signal

54

--

--

Not Used

55

L-GN

1037

BCM Class 2 Serial Data

56

D-BU/WH

1315

Right Front Turn Signal Lamp Supply Voltage

57

WH

2282

Headlamp Washer Relay Control (CE4)

58-59

--

--

Not Used

60

PK

5780

Windshield Wiper Motor Park Switch Signal

61-62

--

--

Not Used

63

L-GN

1177

Right Front Door Open Switch Signal

64

D-BU

2167

Convertible Top Cover Ajar Switch Supply Voltage (CM7)

65

WH

1080

Park Lamp Relay Control

66

L-GN/WH

5723

Ignition Mode Switch Mode Voltage

67

--

--

Not Used

68

TN/BK

5168

Power Sounder Enable Signal (Export)

69

PK/BK

109

Hood Ajar Switch Signal (Export)

70

TN/WH

1384

Selective Ride Control Switch Signal

71

BN/WH

2091

Trunk Release Switch Supply Voltage

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: 1-7, 9, 11, 14-20, 22, 31, 49, 51, 57, 59, 61, 66-71
  • 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 (+)

2

TN/BK

2500

High Speed GMLAN Serial Data (+)

3

PK/WH

1970

Headlamp Low Beam Relay Control

4

PU

524

Headlamp Dimmer Switch High Beam Signal

5

BN/WH

301

Park Lamp Switch On Signal

6

YE

1977

Rear Fog Lamp Relay Control (Export)

7

PK

5068

Intrusion Sensor Switch Disable Signal (UA2)

8

--

--

Not Used

9

TN

2144

Hazard Switch Signal

10

--

--

Not Used

11

OG

5721

Ignition Mode Switch Off LED Signal

12-13

--

--

Not Used

14

TN

28

Horn Relay Control

15

WH

103

Headlamp Switch On Signal

16

OG

192

Front Fog Lamp Switch Signal

17

L-BU

1872

Park Lamp Switch Off Signal

18

GY

5381

Brake Position Sensor 5-Volt Reference

19

TN

2501

High Speed GMLAN Serial Data (-)

20

TN

2501

High Speed GMLAN Serial Data (-)

21

--

--

Not Used

22

L-BU

187

Rear Fog Lamp Switch Signal

23-30

--

--

Not Used

31

TN

5380

Brake Position Sensor Signal

32-48

--

--

Not Used

49

D-BU

75

Reverse Switch Supply Voltage

50

--

--

Not Used

51

BN

1356

Flash To Pass Switch Signal

52-56

--

--

Not Used

57

L-BU

1714

Windshield Wiper Switch Low Signal

58

--

--

Not Used

59

BN

5382

Brake Position Sensor Low Reference

60

--

--

Not Used

61

GY

1884

Cruise Control Set/Coast/Resume/Accelerate Switch Signal

62-65

--

--

Not Used

66

L-BU/WH

1414

Left Front Turn Signal Switch Signal

67

D-BU/WH

1415

Right Front Turn Signal Switch Signal

68

BN/WH

1571

Traction Control Switch Signal

69

D-GN/WH

1932

Shift Select Switch Park Signal (MYC)

L-BU

2182

Reverse Lamp Relay Control (MM6/MZ6)

70

GY/BK

896

Hard Top Connected Signal (Y67)

71

L-GN

5720

Ignition Mode Switch Accessory LED Signal

72

--

--

Not Used

Body Control Module (BCM) C3


Object Number: 1362564  Size: CH

Connector Part Information

  • OEM: 15404825
  • Service: 88988613
  • Description: 41-Way F (RD)

Terminal Part Information

  • Pins: D1, D6
  • Terminal/Tray: 12191475/1
  • Core/Insulation Crimp: A/G
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
  • Pins: A7, A8, A10, B3, B5, B12, C3, C12, D3, D7
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: D12
  • Terminal/Tray: 12110842/4
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: A1, A3, A4, A6, A9, A12, C5, D9-D11
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: Pins A1, A4, A9, A12, C5, D10, D11 - C/A
  • Core/Insulation Crimp: Pins A3, A6, D9 - E/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)

Body Control Module (BCM) C3

Pin

Wire Color

Circuit No.

Function

A1

TN

694

Driver Door Lock Actuator Unlock Control

A2

--

--

Not Used

A3

OG

1732

Courtesy Lamp Supply Voltage

A4

TN

294

Door Lock Actuator Unlock Control

A5

--

--

Not Used

A6

RD/WH

740

Battery Positive Voltage (U2K/U3Z)

A7

RD/WH

240

Battery Positive Voltage

A8

RD/WH

1040

Battery Positive Voltage

A9

YE

18

Left Rear Stop/Turn Lamp Supply Voltage

A10

WH

156

Courtesy Lamp Switch Signal

A11

--

--

Not Used

A12

D-GN

19

Right Rear Stop/Turn Lamp Supply Voltage

B1-B2

--

--

Not Used

B3

RD/WH

1240

Battery Positive Voltage (UA2)

B4

--

--

Not Used

B5

PK

3

Run/Crank Ignition 1 Voltage

B8-B11

--

--

Not Used

B12

PK

5722

Ignition Mode Switch LED Supply Voltage

C3

PK

1139

Ignition 1 Voltage

PK

1139

Ignition 1 Voltage (UL2)

C4

--

--

Not Used

C5

PK

839

Ignition 1 Voltage

C8-C11

--

--

Not Used

C12

PK

94

Windshield Washer Relay Control

D1

RD/BK

242

Battery Positive Voltage

D3

PK

1139

Ignition 1 Voltage

PK

1139

Ignition 1 Voltage

D4

RD/WH

1340

Battery Positive Voltage (Y87)

D5

--

--

Not Used

D6

RD/BK

242

Battery Positive Voltage

D7

RD/WH

840

Battery Positive Voltage

D8

--

--

Not Used

D9

L-GN

24

Backup Lamp Supply Voltage

D10

RD/WH

640

Battery Positive Voltage

D11

RD/WH

540

Battery Positive Voltage (CM7)

D12

RD/WH

1740

Battery Positive Voltage

Body Control Module (BCM) C4


Object Number: 697044  Size: CH

Connector Part Information

  • OEM: 15492668
  • Service: 15356603
  • Description: 68-Way F Metri-Pack 280 Series, Flexlock (GY)

Terminal Part Information

  • Pins: D4
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: C/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: A2, A3, B1, B10, C4, C8, C10, D1, D3, D5, D8, D10, E1, E5, E6, E8, E10, E12, F1, F5, F6, F9
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: Pins A2, B10, D8, D10, E6, E10, E12 - E/A
  • Core/Insulation Crimp: Pins A3, B1, C4, C8, C10, D1, D3, D5, E1, E5, E8, F1, F5, F6, F9 - E/C
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)

Body Control Module (BCM) C4

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

WH

156

Courtesy Lamp Switch Signal

WH

156

Courtesy Lamp Switch Signal

A3

L-GN

24

Backup Lamp Supply Voltage

A4-A12

--

--

Not Used

B1

PK

94

Windshield Washer Switch Signal

B2-B9

--

--

Not Used

B10

PK

1439

Ignition 1 Voltage

PK

1439

Ignition 1 Voltage (MM6/MZ6)

B11-B12

--

--

Not Used

C1

RD/WH

140

Battery Positive Voltage (UL2)

RD/WH

140

Battery Positive Voltage (UE1)

C2-C3

--

--

Not Used

C4

WH

17

Stop Lamp Switch Signal

C5

--

--

Not Used

C8

PK

3

Ignition 1 Voltage

C9

--

--

Not Used

C10

PK

739

Ignition 1 Voltage

PK

739

Ignition 1 Voltage

C11

YE

1491

Backlight Lamp Control (UK3)

C12

BN

1244

Instrument Panel Lamps Supply Voltage 2

D1

RD/WH

340

Battery Positive Voltage

D2

--

--

Not Used

D3

PK

3

Run/Crank Ignition 1 Voltage

D4

L-BU

20

Stop Lamp Supply Voltage

D5

OG

1732

Electronic Control Unit 12-Volt Reference (3)

D8

PK

639

Ignition 1 Voltage

D9

--

--

Not Used

D10

RD/WH

1140

Battery Positive Voltage

RD/WH

1140

Battery Positive Voltage (UV6)

D11-D12

--

--

Not Used

E1

RD/WH

440

Battery Positive Voltage

RD/WH

440

Battery Positive Voltage (N37/NP7)

E2-E4

--

--

Not Used

E5

OG

1732

Electronic Control Unit 12-Volt Reference

E6

RD/WH

740

Battery Positive Voltage

E7

--

--

Not Used

E8

PK

1039

Ignition 1 Voltage

PK

1039

Ignition 1 Voltage (MM6/MZ6)

E9

--

--

Not Used

E10

RD/WH

1240

Battery Positive Voltage

E11

--

--

Not Used

E12

BK

1550

Ground

F1

RD/WH

240

Battery Positive Voltage

RD/WH

240

Battery Positive Voltage (UA2)

F2-F4

--

--

Not Used

F5

RD/WH

1040

Battery Positive Voltage (T79)

F6

RD/WH

1040

Battery Positive Voltage (CM7)

F7-F8

--

--

Not Used

F9

RD/WH

3140

Battery Positive Voltage (CM7)

F10-F12

--

--

Not Used

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

  • Pins: 2, 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

--

--

Not Used

2

PU

1132

DLC Class 2 Serial Data

3

--

--

Not Used

4

BK

1450

Ground

5

BK/WH

851

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

1040

Battery Positive Voltage