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 (GY)

Terminal Part Information

  • Pins: 1, 6 -- 8, 13 -- 20, 22, 26, 33, 35, 36, 44, 47, 51, 54, 55, 57, 60 -- 68, 70
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
  • Pins: 31
  • 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

L-BU/BK

747

Left Rear Door Ajar Switch Signal (Sedan)

2-5

--

--

Not Used

6

WH

682

Door Lock Lock/Unlock Signal

7

WH

682

Door Lock Lock/Unlock Signal

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 Front Turn Signal Lamp Supply Voltage

18

D-GN

5060

Low Speed GMLAN Serial Data

19

TN/WH

746

Right Front Door Ajar Switch Signal

20

L-GN/BK

748

Right Rear Door Ajar Switch Signal (Sedan)

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 (LSJ)

27-32

--

--

Not Used

33

D-GN/WH

1135

A/T Shift Lock Control Solenoid Supply Voltage

34

--

--

Not Used

35

L-BU

14

Left Front Turn Signal Lamp Supply Voltage

36

D-GN

5060

Low Speed GMLAN Serial Data

37-43

--

--

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 Switch Signal

52-53

--

--

Not Used

54

YE

317

Fog Lamp Relay Control (T37)

55

OG/BK

744

Rear Compartment Lid Ajar Switch Signal

56

OG/B

737

Rear Compartment Lamp Control

57

BN

253

Rear Compartment Release Relay Control

58-59

--

--

Not Used

60

TN

28

Horn Relay Control

61

BK/WH

1251

Ground

62

RD/WH

1240

Battery Positive Voltage

63

GY

596

5-Volt Reference-1

64

BK/WH

751

Ground

65

TN/WH

1704

Low Reference

66

GY/BK

1798

Low Reference (Sedan)

67

YE/BK

61

Low Reference

68

WH

5075

Current Sensor Signal

69

--

--

Not Used

70

D-GN/WH

636

Ambient Air Temperature Sensor Signal

71-72

--

--

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 (GY)

Terminal Part Information

  • Pins: 1 -- 5, 9, 10 -- 12, 14 -- 17, 19, 20, 26, 38, 44, 47, 51, 54 -- 58, 61, 62, 66 -- 69, 72
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
  • Pins: 70
  • 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) C2

Pin

Wire Color

Circuit No.

Function

1

BN/WH

2500

High Speed GMLAN Serial Data (+)

2

TN/BK

2500

High Speed GMLAN Serial Data (+)

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 Lid Release Switch

11

D-GN

264

Security Indicator Supply Voltage

12

TN/WH

1455

Keyless Entry Program Enable Signal

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 (T37)

17

PU/WH

549

Headlamp Switch Headlamps Off Signal

18

--

--

Not Used

19

BN

2501

High Speed GMLAN Serial Data (-)

20

TN

2501

High Speed GMLAN Serial Data (-)

21-25

--

--

Not Used

26

D-GN

44

Instrument Panel Lamp Dimmer Switch Signal

27-37

--

--

Not Used

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

52-53

--

--

Not Used

54

L-BU

20

Stop Lamp Supply Voltage

55

--

--

Not Used

56

WH

1390

Off/Run/Crank Voltage

57

GY

112

Windshield Wiper Switch Signal 1

58

PU

719

Low Reference

59-60

--

--

Not Used

61

GY

1884

Cruise Control Switch Signal (K34)

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

L-GN

66

A/C Request Signal

70

--

--

Not Used

71

PU

5234

Passenger Seat Belt Reminder Lamp

72

WH

193

Rear Defog Relay Control

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

  • 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

A1

TN

294

Door Lock Actuator Unlock Control (AU3)

A2

TN

294

Door Lock Actuator Unlock Control (AU3)

TN

294

Door Lock Actuator Unlock Control (AU3) (Sedan)

A3

D-BU/WH

149

Courtesy Lamp Supply Voltage

A4

GY

295

Door Lock Actuator Lock Control (AU3) (Driver)

GY

295

Door Lock Actuator Lock Control (AU3) (Passenger)

A5

GY

295

Door Lock Actuator Lock Control (AU3)

GY

295

Door Lock Actuator Lock Control (AU3) (Sedan)

A6

--

--

Not Used

A7

BN

9

Park Lamp Supply Voltage

A8

PK

339

Run/Crank Ignition 1 Voltage (UQ3)

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

B2

--

--

Not Used

B3

RD/WH

1240

Battery Positive Voltage

RD/WH

1240

Battery Positive Voltage

B4

--

--

Not Used

B5

BN

4

Accessory Voltage

BN

4

Accessory Voltage (L61/LE5)

B6-B7

--

--

Not Available

B8-B11

--

--

Not Used

B12

GY

8

Instrument Panel Lamp Supply Voltage (LSJ) and (J41)

B12

GY

8

Instrument Panel Lamp Supply Voltage (L61/LE5)

GY

8

Instrument Panel Lamp Supply Voltage (L61/LE5)

C1-C2

--

--

Not Available

C3

D-GN

1301

Retained Accessory Power Fuse Supply Voltage

C4

--

--

Not Used

C5

D-GN

801

Retained Accessory Power 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

--

--

Not Available

D3

--

--

Not Used

D4

RD/WH

840

Battery Positive Voltage

D5

D-GN

801

Retained Accessory Power Fuse Supply Voltage

D6

PK

739

Ignition 1 Voltage

D7

PK

1339

Ignition 1 Voltage

PK

1339

Ignition 1 Voltage

D8-D9

--

--

Not Used

D10

RD/BK

442

Battery Positive Voltage

D11

--

--

Not Used

D12

RD/WH

242

Battery Positive Voltage

Body Control Module (BCM) C4


Object Number: 697044  Size: CH

Connector Part Information

  • OEM: 15356603
  • Service: 88988776
  • Description: 68-Way F Metri-Pack 280 Series (L-GY)

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) C4

Pin

Wire Color

Circuit No.

Function

A1

RD/WH

640

Battery Positive Voltage (UQ3)

RD/WH

640

Battery Positive Voltage (UQ3)

A2-A12

--

--

Not Used

B1

OG

228

Windshield Washer Pump Control

B2-B12

--

--

Not Used

C1

RD/WH

1440

Battery Positive Voltage

C2

GY

8

Instrument Panel Lamp Supply Voltage

GY

8

Instrument Panel Lamp Supply Voltage

C3-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 Voltage

D4

BN

141

Ignition 3 Voltage

D5

--

--

Not Used

D6-D7

--

--

Not Available

D8-D9

--

--

Not Used

D10

RD/WH

1140

Battery Positive Voltage

RD/WH

1140

Battery Positive Voltage

D11-D12

--

--

Not Used

E1

RD/WH

140

Battery Positive Voltage

E2-E5

--

--

Not Used

E6

PK

439

Ignition 1 Voltage

PK

439

Ignition 1 Voltage (Coupe) (TV5)

E7-E11

--

--

Not Used

E12

BK/WH

651

Ground

F1

RD/WH

1540

Battery Positive Voltage

RD/WH

1540

Battery Positive Voltage

F2

GY

8

Instrument Panel Lamp Supply Voltage

F3

GY

8

Instrument Panel Lamp Supply Voltage

GY

8

Instrument Panel Lamp Supply Voltage

F4

PK

339

Ignition 1 Voltage

PK

339

Ignition 1 Voltage

F5

PK

339

Ignition 1 Voltage

PK

339

Ignition 1 Voltage

F6

PK

339

Ignition 1 Voltage

F7-F8

--

--

Not Used

F9

PK

1539

Ignition 1 Voltage

PK

1539

Ignition 1 Voltage

F10-F12

--

--

Not Used

Data Link Connector (DLC)


Object Number: 808656  Size: CH

Connector Part Information

  • OEM: 15317575
  • Service: 15317575
  • Description: 16-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

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

Data Link Connector (DLC)

Pin

Wire Color

Circuit No.

Function

1

D-GN

5060

Low Speed GMLAN Serial Data

2

D-GN

1049

PCM Class 2 Serial Data (LSJ)

3

--

--

Not Used

4

BK

550

Ground

5

BK/WH

1051

Signal 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

40

Battery Positive Voltage