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: Body Control Module (BCM) C5
Connector 6: Body Control Module (BCM) C6
Connector 7: Body Control Module (BCM) C7
Connector 8: Data Link Connector (DLC)
Connector 9: Terminator Resistor (Except MH6)

Body Control Module (BCM) C1


Object Number: 1664495  Size: CH

Connector Part Information

  • OEM: HITPB-27-AL-M
  • Service: 88988838
  • Description: 27-Way F 0.64 Unsealed (L-GN)

Terminal Part Information

  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Body Control Module (BCM) C1

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

WH

1390

Ignition 0 Signal

3

GY

1884

Cruise Control Switch Signal

4

WH/BK

1073

5-Volt Reference

5

L-GN

1715

Windshield Wiper Switch High Signal

6

D-BU

1796

Steering Wheel Controls Signal (UK3)

7

--

--

Not Used

8

BK/WH

1251

Ground

9

L-BU

1714

Windshield Wiper Switch Low Signal

10-13

--

--

Not Used

14

PK

3

Ignition 1 Voltage

15

L-BU/WH

1414

Left Turn Signal Switch Signal

16

D-BU/WH

1415

Right Turn Signal Switch Signal

17

PU

1375

Steering Wheel Control Supply Voltage

18

PU

524

Headlamp Dimmer Switch High Beam Signal

19

TN

2144

Hazard Switch Signal

20

--

--

Not Used

21

BN

4

Accessory Voltage

22-23

--

--

Not Used

24

PK

94

Windshield Washer Switch Signal

25

BN

1356

Flash To Pass Switch Signal

26

D-GN/WH

1135

A/T Shift Lock Control Solenoid Supply Voltage

27

--

--

Not Used

Body Control Module (BCM) C2


Object Number: 1664496  Size: CH

Connector Part Information

  • OEM: HITPB-25-B-S
  • Service: 88988839
  • Description: 25-Way F Receptacle 0.64 2.8 Unsealed (WH)

Terminal Part Information

  • Pins: 1, 2, 3, 3
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
  • Pins: 8, 11, 12, 17, 21
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Body Control Module (BCM) C2

Pin

Wire Color

Circuit No.

Function

1

OG

1732

Inadvertent Power Supply Voltage

2

RD/WH

1240

Battery Positive Voltage

3

GY

8

Instrument Panel Lamp Supply Voltage

4-7

--

--

Not Used

8

BN/WH

301

Park Lamp Switch On Signal

9-10

--

--

Not Used

11

L-GN/BK

1137

DRL Ambient Light Sensor Signal

12

WH

103

Headlamp Switch ON Signal

13-16

--

--

Not Used

17

D-GN

306

Headlamp Switch Headlamps OFF Signal

18-20

--

--

Not Used

21

L-BU

1788

Traction Control Switch Signal

22

PU/WH

5905

Key Capture/Column Lock Shift Position Signal

23-25

--

--

Not Used

Body Control Module (BCM) C3


Object Number: 1664498  Size: CH

Connector Part Information

  • OEM: HITPB-25-C-LE
  • Service: 88988840
  • Description: 25-Way F HIT Series (L-BU)

Terminal Part Information

  • Pins: 1, 2, 3, 5
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
  • Pins: 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 17, 18, 19, 21, 22
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Body Control Module (BCM) C3

Pin

Wire Color

Circuit No.

Function

1

BK/WH

1551

Ground

2

RD/WH

240

Battery Positive Voltage

3

RD/WH

1040

Battery Positive Voltage

4

--

--

Not Used

5

BK/WH

1551

Ground

6

--

--

Not Used

7

YE

749

Security Indicator Control

8

TN/BK

2500

High Speed GMLAN Serial Data Bus+

9

TN

2501

High Speed GMLAN Serial Data Bus-

10

D-GN

5060

Low Speed GMLAN Serial Data

11

D-GN

44

Instrument Panel Lamps Dimmer Switch Signal

12

OG/WH

812

12-Volt Reference

13

D-BU

6037

Brake Pedal Position Sensor Signal

14

OG/BK

6035

Low Reference

15

GY

6036

5-Volt Reference

16

TN/BK

2500

High Speed GMLAN Serial Data Bus+

17

TN

2501

High Speed GMLAN Serial Data Bus-

18

PU/WH

1382

LED Dimming Signal

19

L-BU

5986

Serial Data Communication Enable

20

--

--

Not Used

21

OG

192

Front Fog Lamp Switch Signal

22

D-GN/WH

7158

Cruise Control Indicator Dimming Signal

23-25

--

--

Not Used

Body Control Module (BCM) C4


Object Number: 1664499  Size: CH

Connector Part Information

  • OEM: HITPB-25-D-K
  • Service: 88988841
  • Description: 25-Way F Receptacle 0.64 2.8 (BK)

Terminal Part Information

  • Pins: 1, 2, 3, 4, 5
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
  • Pins: 7, 9, 10, 11, 12, 13, 15, 16, 17, 19, 21, 22, 23
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Body Control Module (BCM) C4

Pin

Wire Color

Circuit No.

Function

1

RD/WH

340

Battery Positive Voltage

2

RD/WH

240

Battery Positive Voltage

3

RD/WH

440

Battery Positive Voltage

4

RD/WH

1240

Battery Positive Voltage

5

D-BU/WH

1315

Right Front Turn Signal Lamp Supply Voltage

6

--

--

Not Used

7

YE

196

Windshield Wiper Motor Park Switch Signal

8

--

--

Not Used

9

BK

50

Ground

10

RD/WH

2440

Battery Positive Voltage

11

D-GN/WH

1317

Fog Lamp Relay Control (T96)

12

YE

5187

Right Trailer Stop/Turn Relay Control (V92)

13

OG

5186

Left Trailer Stop/Turn Relay Control (V92)

14

--

--

Not Used

15

OG

2268

Windshield Washer Relay Control

16

TN/WH

1969

Headlamp High Beam Relay Control

17

PK/BK

109

Hood Ajar Switch Signal (AP3)

18

--

--

Not Used

19

BN

4

Accessory Voltage

20

--

--

Not Used

21

PK

1439

Ignition 1 Voltage

22

YE

5704

Liftgate Latch Relay Coil Control

23

PU

544

DRL Relay Control

24-25

--

--

Not Used

Body Control Module (BCM) C5


Object Number: 1664500  Size: CH

Connector Part Information

  • OEM: HITPB-25-E-N
  • Service: 88988837
  • Description: 25-Way F Receptacle Unsealed 0.64 2.8 (BN)

Terminal Part Information

  • Pins: 1, 2, 4, 5
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
  • Pins: 6, 8, 9, 10, 11, 14, 15, 16, 18, 20, 21, 23, 24
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Body Control Module (BCM) C5

Pin

Wire Color

Circuit No.

Function

1

YE

18

Left Rear Stop/Turn Lamp Supply Voltage

2

D-GN

19

Right Rear Stop/Turn Lamp Supply Voltage

3

--

--

Not Used

4

L-BU/WH

1314

Left Front Turn Signal Lamp Supply Voltage

5

L-BU

1320

CHMSL Supply Voltage

6

WH

17

Stop Lamp Switch Signal

7

--

--

Not Used

8

PK

5076

Current Sensor Supply Voltage

9

WH

5075

Current Sensor Signal

10

BN

5077

Low Reference

11

TN

707

RAP Relay Coil Supply Voltage

12-13

--

--

Not Used

14

YE

243

Accessory Voltage

15

PU

5531

Hood Closed Switch Signal (AP3)

16

OG/BK

233

Park Brake Switch Signal

17

--

--

Not Used

18

TN

28

Horn Relay Control

19

--

--

Not Used

20

GY

91

Windshield Wiper Switch Signal 2

21

TN

860

Front Windshield Wiper Switch High Signal

22

--

--

Not Used

23

PK/WH

1970

Headlamp Low Beam Relay Control

24

WH

1080

Park Lamp Relay Control

25

--

--

Not Used

Body Control Module (BCM) C6


Object Number: 1664502  Size: CH

Connector Part Information

  • OEM: HITPB-25-F-PK
  • Service: 88988842
  • Description: 25-Way F Receptacle Unsealed 0.64 2.8 (PK)

Terminal Part Information

  • Pins: 1, 2
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
  • Pins: 8, 9, 10, 12, 15, 18
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Body Control Module (BCM) C6

Pin

Wire Color

Circuit No.

Function

1

D-BU/WH

149

Courtesy Lamp Supply Voltage

2

L-GN

24

Backup Lamp Supply Voltage

3-7

--

--

Not Used

8

TN/WH

746

Right Front Door Ajar Switch Signal

9

D-BU

245

Passenger Door Lock Switch Unlock Signal

10

GY/BK

745

Left Front Door Ajar Switch Signal

11

--

--

Not Used

12

PK/BK

1303

Liftgate Ajar Switch Signal

13-14

--

--

Not Used

15

GY

5797

Rear Closure Handle Switch Open Signal

16-17

--

--

Not Used

18

L-BU

244

Passenger Door Lock Switch Lock Signal

19-25

--

--

Not Used

Body Control Module (BCM) C7


Object Number: 1664505  Size: CH

Connector Part Information

  • OEM: HITPB-28-G-H
  • Service: 88988806
  • Description: 28-Way F Receptacle 0.64 (GY)

Terminal Part Information

  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)

Body Control Module (BCM) C7

Pin

Wire Color

Circuit No.

Function

1-5

--

--

Not Used

6

YE

356

Driver Door Lock Relay Unlock Control

7

L-GN

1391

Driver Door Unlock Relay Control

8

--

--

Not Used

9

L-BU

5921

Driver Door Unlock Relay Control

10

--

--

Not Used

11

OG/BK

781

Driver Door Lock Switch Unlock Signal

12

PK/BK

780

Driver Door Lock Switch Lock Signal

13

D-GN

5706

Liftgate Latch Relay Supply Voltage

14-24

--

--

Not Used

25

PU/WH

6816

Indicator Dimming Control

26-28

--

--

Not Used

Data Link Connector (DLC)


Object Number: 1243575  Size: CH

Connector Part Information

  • OEM: 348822-2
  • Service: 89046778
  • Description: 16-Way F Diagnostic Connector (BK)

Terminal Part Information

  • Terminal/Tray: 776001-1/16
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 15315247/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

1450

Ground

5

BK/WH

1551

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

1840

Battery Positive Voltage

Terminator Resistor (Except MH6)


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)

Terminator Resistor (Except MH6)

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-