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-Pack 64 Series (GY)

Terminal Part Information

  • 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

L-GN/BK

592

DRL Relay Control

3

D-GN/WH

636

Ambient Air Temperature Sensor Signal

4

TN

305

Trunk Key Switch Signal (Sedan)

WH/BK

1221

Lift Gate Release Switch Signal (Extended Sedan)

5

--

--

Not Used

6

YE

61

Ground

7-11

--

--

Not Used

12

BK

1050

Ground

13

TN

28

Horn Relay Control

14

--

--

Not Used

15

L-BU

2182

Reverse Lamp Relay Control

16

L-BU

1344

Trunk Release Relay Control

17

--

--

Not Used

18

OG/BK

744

Rear Compartment Lid Ajar Switch Signal

19

YE

317

Fog Lamp Relay Control (T96)

20-21

--

--

Not Used

22

D-GN

113

Windshield Wiper Switch Signal 2

23

--

--

Not Used

24

WH

17

Stop Lamp Supply Voltage

25

--

--

Not Used

26

YE

196

Windshield Wiper Motor Park Switch Signal

27-28

--

--

Not Used

29

TN/WH

1969

Headlamp High Beam Relay Control

30-32

--

--

Not Used

33

BN/WH

1571

Traction Control Switch Signal (NW7/NW9)

34

--

--

Not Used

35

L-GN

262

Driver Door Key Switch Signal

36

--

--

Not Used

37

D-GN

5060

Low Speed GMLAN Serial Data

38

D-BU

5364

Left DRL/Turn Supply Voltage

39

--

--

Not Used

40

D-GN/WH

1135

A/T Shift Lock Control Solenoid Supply Voltage

41

--

--

Not Used

42

WH

17

Stop Lamp Supply Voltage

43-46

--

--

Not Used

47

L-GN

1748

Coolant Level Switch Sighal

48-50

--

--

Not Used

51

GY/BK

745

Left Front Door Ajar Switch Signal

52

--

--

Not Used

53

L-GN/BK

748

Passenger Door Ajar Switch Signal

54

L-BU/BK

747

Passenger Door Ajar Switch Signal

55

D-GN

5060

Low Speed GMLAN Serial Data

56

D-GN

5365

Right DRL/Turn Supply Voltage

57

WH

193

Rear Defog Relay Control

58

YE

5199

Run/Crank Relay Coil Control

59

L-BU

1134

Park Brake Switch Signal

60

PK

849

Brake Fluid Level Sensor Signal

61

D-GN

5525

Tap Up/Tap Down Enable Signal

62

TN/WH

99

Windshield Washer Fluid Level Signal

63-64

--

--

Not Used

65

WH

1080

Park Lamp Relay Control

66

WH

682

Door Lock Lock/Unlock Signal

67

WH

682

Door Lock Lock/Unlock Signal

68

--

--

Not Used

69

PK/BK

109

Hood Ajar Switch Signal (AP3/AP8)

70

PU

5531

Hood Ajar Switch Signal (AP3/AP8)

71

BN/WH

2091

Trunk Release Switch Supply Voltage

72

TN/WH

746

Passenger Door Ajar Switch Signal

Body Control Module (BCM) - C2


Object Number: 1376254  Size: CH

Connector Part Information

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

Terminal Part Information

  • 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

PK/WH

1970

Headlamp Low Beam Relay Control

4

PU

524

Headlamp Dimmer Switch High Beam Signal

5

BN/WH

301

Park Lamp Switch Signal

6

L-GN

696

Cruise Control Cancel Signal

7-8

--

--

Not Used

9

WH

111

Hazard Switch Signal

10

--

--

Not Used

11

D-GN

264

Security Indicator Signal

12

L-GN

377

Serial Data

13

BK/WH

651

Ground

14

TN

28

Horn Relay Control

15

WH

103

Headlamp Switch Headlamps on Signal

16

OG

192

Front Fog Lamp Switch Signal (T96)

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 Lamps Dimmer Switch Signal

27-28

--

--

Not Used

29

L-GN

5980

Adjustable Pedal Inhibit Signal (JF4)

30

--

--

Not Used

31

YE

5361

Brake Pedal Position Sensor Signal

32

--

--

Not Used

33

YE

317

Fog Lamp Relay Control (T96)

34-36

--

--

Not Used

37

D-GN

5060

Low Speed GMLAN Serial Data

38

D-GN

5060

Low Speed GMLAN Serial Data

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

52-54

--

--

Not Used

55

D-GN

5060

Low Speed GMLAN Serial Data

56

WH

1390

Off/Run/Crank Voltage Signal

57

GY

112

Windshield Wiper Switch Signal 1

58

PU

719

Low Reference

59

BN

5360

Low Reference

60

--

--

Not Used

61

GY

1884

Cruise Control Switch Signal

62

WH/BK

1073

5-Volt Reference

63

L-BU/BK

590

Sunload Sensor Signal (C68)

64

GY

1548

Sunload Sensor Signal (C68)

65

--

--

Not Used

66

YE/BK

1418

Left Turn Signal Switch Signal

67

D-GN/WH

1419

Right Turn Signal Switch Signal

68

L-BU

292

Rear Defog Switch Signal (C60)

69

D-GN/WH

762

A/C Request Signal (C60)

70-71

--

--

Not Used

72

TN

683

Rear Defog Relay Control (C60)

Body Control Module (BCM) - C3


Object Number: 1362564  Size: CH

Connector Part Information

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

Terminal Part Information

  • Pins: A1-A10, A12, B1, B5, B12, C3, C9, C12, D3-D5, D11
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: Pins A1-A5, A9, A12, B1: E/A
  • Core/Insulation Crimp: Pins A6-A8, A10, B5, B12, C3, C9, C12, D3-D5, D11: E/C
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: A11, B11, C5, C11, D6, D10, D12
  • Terminal/Tray: 15324340/19
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 12094430/J-35616-4A (PU)
  • Pins: D1
  • Terminal/Tray: 12110127/19
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 12150860/J-35616-44 (YE)

Body Control Module (BCM) - C3

Pin

Wire Color

Circuit No.

Function

A1

TN

294

Door Lock Actuator Unlock Control

A2

TN

294

Door Lock Actuator Unlock Control

TN

294

Door Lock Actuator Unlock Control

A3

OG

1732

Courtesy Lamps Supply Voltage

A4

GY

295

Door Lock Actuator Lock Control

GY

295

Door Lock Actuator Lock Control

A5

GY/BK

295

Door Lock Actuator Lock Control

GY/BK

295

Door Lock Actuator Lock Control

A6

PK

1139

Ignition 1 Voltage

A7

BN

9

Park Lamp Supply Voltage

A8

PK

339

Ignition 1 Voltage

A9

YE

18

Left Rear Stop/Turn Lamp Supply Voltage

A10

GY

157

Courtesy Lamp Control

A11

D-BU

1307

Power Window Master Switch Lockout Signal

A12

D-GN

19

Right Rear Stop/Turn Lamp Supply Voltage

B1

TN

694

Driver Door Lock Actuator Unlock Control

B2-B4

--

--

Not Used

B5

BN

4

Accessory Voltage

B6-B7

--

--

Not Available

B8-B10

--

--

Not Used

B11

D-BU

1307

Power Window Master Switch Lockout Signal

B12

GY

8

Instrument Panel Lamp Supply Voltage

C1- C2

--

--

Not Available

C3

YE

243

Accessory Voltage (KA1)

YE

243

Accessory Voltage (KA1)

C4

--

--

Not Used

C5

YE

343

Accessory Voltage

C6- C7

--

--

Not Available

C8

--

--

Not Used

C9

L-GN

377

Serial Data

C11

D-BU

1307

Power Window Master Switch Lockout Signal

C12

OG

228

Windshield Washer Pump Control (w/o C25)

D-BU

477

Windshield Washer Pump Control (w/ C25)

D1

RD/BK

342

Battery Positive Voltage

D2

--

--

Not Available

D3

YE

243

Accessory Voltage

D4

RD/WH

640

Battery Positive Voltage

D5

YE

343

Accessory Voltage

D6

D-GN

591

Ignition 1 Voltage

D7-D9

--

--

Not Used

D10

RD/BK

442

Battery Positive Voltage

D11

RD/WH

1340

Battery Positive Voltage

D12

RD/BK

242

Battery Positive Voltage

Body Control Module (BCM) - C4


Object Number: 697044  Size: CH

Connector Part Information

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

Terminal Part Information

  • Pins: B1-B2, B6, C2-C3, C5, C8, D1, D3, D8, D10, E1, E10, E12, F1-F3, F6, F9
  • Terminal/Tray: 12110844/4
  • Core/Insulation Crimp: Pins B1, D8: C/A
  • Core/Insulation Crimp: Pins B2, B6, C2-C3, C5, C8, D1, D3, D10, E1, E10, E12, F1-F3, F6, F9
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: B3, C1, C4, E3
  • Terminal/Tray: 12110842/4
  • Core/Insulation Crimp: C/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: B10, D4, E2
  • Terminal/Tray: 15324340/19
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 12094430/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

GY

8

Instrument Panel Lamp Supply Voltage (K34/UK3)

B3

BN

41

Ignition 3 Voltage (C60)

B4-B5

--

--

Not Used

B6

BN

141

Ignition 3 Voltage

B7-B9

--

--

Not Used

B10

YE

443

Accessory Voltage (C25)

B11-B12

--

--

Not Used

C1

RD/WH

340

Battery Positive Voltage

C2

GY

8

Instrument Panel Lamp Supply Voltage

GY

8

Instrument Panel Lamp Supply Voltage

C3

L-GN

377

Serial Data

C4

OG

52

High Blower Motor Control (C60)

C5

BN

9

Park Lamp Supply Voltage (C60)

C6-C7

--

--

Not Available

C8

BN

4

Accessory Voltage Signal

BN

4

Accessory Voltage Signal

C9-C12

--

--

Not Used

D1

RD/WH

1040

Battery Positive Voltage

D2

--

--

Not Used

D3

PK

3

Ignition 1 Voltage Signal

PK

3

Ignition 1 Voltage Signal

D4

PU

65

Blower Motor Supply Voltage (C60)

D5

--

--

Not Used

D6-D7

--

--

Not Available

D8

YE

143

Accessory Voltage

D9

--

--

Not Used

D10

RD/WH

740

Battery Positive Voltage (JF4)

RD/WH

740

Battery Positive Voltage (JF4)

D11-D12

--

--

Not Used

E1

RD/WH

440

Battery Positive Voltage

RD/WH

440

Battery Positive Voltage

E2

RD/BK

442

Battery Positive Voltage (C68)

E3

D-BU

101

Blower Motor Supply Voltage (C60)

E4-E9

--

--

Not Used

E10

RD/WH

840

Battery Positive Voltage (UE1)

E11

--

--

Not Used

E12

BK

650

Ground

F1

RD/WH

1440

Battery Positive Voltage

RD/WH

1440

Battery Positive Voltage

F2

GY

8

Instrument Panel Lamp Supply Voltage

GY

8

Instrument Panel Lamp Supply Voltage (JF4)

F3

GY

8

Instrument Panel Lamp Supply Voltage

GY

8

Instrument Panel Lamp Supply Voltage (T96)

F4-F5

--

--

Not Used

F6

PK

339

Ignition 1 Voltage

F7-F8

--

--

Not Used

F9

PK

1039

Ignition 1 Voltage (Except SS)

F10-F12

--

--

Not Used

Data Link Connector (DLC)


Object Number: 808656  Size: CH

Connector Part Information

  • OEM: 15488184
  • Service: 19115029
  • Description: 16-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Pins: 1-2, 4-6, 14, 16
  • Terminal/Tray: 12129484/19
  • Core/Insulation Crimp: Pins 1-2, 4, 6, 14, 16: E/C
  • Core/Insulation Crimp: Pins 5: E/A
  • 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

PU

1807

Class 2 Serial Data

3

--

--

Not Used

4

BK

650

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

440

Battery Positive Voltage