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)

Body Control Module (BCM) C1


Object Number: 1664495  Size: CH

Connector Part Information

  • OEM: HITPB-27-A-LM
  • Service: See Catalog
  • Description: 27-Way F (GN)

Terminal Part Information

  • Pins: 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 21, 24, 25, 26
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)
  • Pins: 23
  • 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

--

--

Not Used

2

WH

1390

Off/Run/Crank Voltage

3

GY/PK

1884

Cruise Control Set/Coast/Resume/Accel Switch Signal

4

WH/BK

1073

Ignition Key Resistor Signal

5

L-GN

1715

Windshield Wiper Switch High Signal

6

D-BU

1796

Steering Column Radio Control Signal

7

GY

397

Cruise Control On Switch Signal

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

Remote Radio Control ACC Supply Voltage

18

PU/L-GN

524

Headlamp Switch High Beam Signal

19

TN

2144

Hazard Switch Signal

20

--

--

Not Used

21

BN

4

Accessory Voltage

22

--

--

Not Used

23

TN/GY

1355

Valet Mode Switch Signal

24

PK

94

Windshield Washer Switch Signal

25

YE

307

Flash to Pass Switch Signal

26

PU/WH

816

Brake Transmission Shift Interlock Solenoid Control (AV8)

27

--

--

Not Used

Body Control Module (BCM) C2


Object Number: 1664496  Size: CH

Connector Part Information

  • OEM: HITPB-25-B-S
  • Service: See Catalog
  • Description: 25-Way F (WH)

Terminal Part Information

  • Pins: 1, 2, 3
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
  • Pins: 8, 10, 11, 12, 17, 18, 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) C2

Pin

Wire Color

Circuit No.

Function

1

OG

1732

12 Volt Reference

2

PK/D-BU

3140

Battery Positive Voltage

3

GY

8

Instrument Panel Lamp Supply Voltage

4-7

--

--

Not Used

8

L-BU

13

Park Lamp Switch ON Signal

9

--

--

Not Used

10

L-BU

383

Trunk Release Control

11

L-GN/BK

1137

Ambient Light Sensor Signal

12

WH

103

Headlamp Switch Off Signal

13-16

--

--

Not Used

17

D-GN

306

Park Lamp Switch ON Signal

18

PK/BK

1597

Courtesy Lamp Switch On Signal

19-20

--

--

Not Used

21

BN/WH

1571

Traction Control Switch Signal

22

PU

6027

Brake Transmission Shift Interlock Solenoid Control (AV8)

23-25

--

--

Not Used

Body Control Module (BCM) C3


Object Number: 1664498  Size: CH

Connector Part Information

  • OEM: HITPB-25-C-LE
  • Service: See Catalog
  • Description: 25-Way F (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: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 25
  • 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

450

Ground

2

D-GN/PU

1940

Battery Positive Voltage (Early Production)

D-GN/GY

1940

Battery Positive Voltage (Late Production)

3

PK/GY

3040

Battery Positive Voltage

4

--

--

Not Used

5

BK

450

Ground

6-7

--

--

Not Used

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

PK

1444

I/P Dimming Signal

12

OG/WH

812

12 Volt Reference

13

L-BU/YE

5361

Brake Apply Sensor Signal

14

L-BU/BK

853

Brake Apply Sensor Supply Voltage

15

GY

5381

Brake Apply Sensor Low Reference

16

TN/BK

2500

High Speed GMLAN Serial Data Bus +

17

TN

2501

High Speed GMLAN Serial Data Bus -

18

YE

1491

Backlight Lamp Control

19

OG/YE

5727

High Speed GMLAN Serial Data Wake Up

20

--

--

Not Used

21

OG

192

Front Fog Lamp Switch Signal

22

D-GN/WH

7158

Cruise Control Indicator Dimming Signal

23-24

--

--

Not Used

25

PU/WH

1382

LED Dimming Signal

Body Control Module (BCM) C4


Object Number: 1664499  Size: CH

Connector Part Information

  • OEM: HITPB-25-D-K
  • Service: See Catalog
  • Description: 25-Way F (BK)

Terminal Part Information

  • Pins: 1, 2, 3, 4, 5
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
  • Pins: 7, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 24, 25
  • 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/YE

340

Battery Positive Voltage

2

TN/PK

5040

Battery Positive Voltage (Early Production)

TN/OG

5040

Battery Positive Voltage (Late Production)

3

RD/GN

440

Battery Positive Voltage

4

YE/VT

1240

Battery Positive Voltage

5

D-BU/WH

1315

Right Front Turn Signal Lamp Supply Voltage

6

--

--

Not Used

7

YE/PU

196

Windshield Wiper Motor Park Switch Signal

8

--

--

Not Used

9

BK

50

Ground

10

TN/OG

3640

Battery Positive Voltage

11

D-GN/WH

1317

Fog Lamp Relay Control

12-13

--

--

Not Used

14

L-GN

482

Outside Moisture Sensor Signal 2 (CE1)

15

OG/GY

227

Windshield Washer Relay Control

16

TN/WH

1969

Headlamp High Beam Relay Control

17

PK/BK

109

Hood Ajar Switch Signal

18

TN/YE

481

Outside Moisture Sensor Signal 1 (CE1)

19

D-BU/WH

5985

Accessory Wake up Serial Data

20

D-BU

6561

Right Cornering Lamp Relay Control

21

PK

1439

Run/Crank Ignition 1 Voltage

22-23

--

--

Not Used

24

BN

6560

Left Cornering Lamp Relay Control

25

WH

1080

Park Lamp Relay Control

Body Control Module (BCM) C5


Object Number: 1664500  Size: CH

Connector Part Information

  • OEM: HITPB-25-E-N
  • Service: See Catalog
  • Description: 25-Way F (BN)

Terminal Part Information

  • Pins: 1, 2, 4, 5
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
  • Pins: 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, 13, 15, 16, 17, 18, 19, 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

Stop Lamp Relay Coil Supply Voltage (Domestic)

YE/WH

5065

Stop Lamp Relay Coil Supply Voltage (Export)

6

WH

17

Stop Lamp Switch Signal

7

--

--

Not Used

8

PK

5076

Current Sensor Supply Voltage

9

PU/WH

5075

Current Sensor Signal

10

BN

5077

Current Sensor Low Reference

11

BK/TN

707

RAP Relay Coil Supply Voltage

12

--

--

Not Used

13

L-GN/BN

5486

Run Relay Coil Control

14

--

--

Not Used

15

PU/OG

5531

Hood Closed Switch Signal

16

L-BU/WH

1134

Park Brake Switch Signal

17

YE/WH

5356

Left Tail Lamp Outage Detection Signal

18

TN

28

Horn Relay Control

19

YE

5810

Park Enable Signal

20

GY

91

Wiper Relay Control

21

TN

860

Wiper High Speed Relay Control

22

--

--

Not Used

23

PK/WH

1970

Headlamp Low Beam Relay Control

24

D-BU

45

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: See Catalog
  • Description: 25-Way F (PK)

Terminal Part Information

  • Pins: 1, 2, 3
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12094429/J-35616-4A (PU)
  • Pins: 8, 12, 14, 15, 16, 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) C6

Pin

Wire Color

Circuit No.

Function

1

GY/BK

690

Courtesy Lamp Control

2

L-GN

24

Backup Lamp Supply Voltage

3

GY

8

Instrument Panel Lamp Supply Voltage

4-7

--

--

Not Used

8

L-GN/BK

5926

Rear Access Open Switch Signal

9-11

--

--

Not Used

12

OG/GY

744

Trunk Ajar Switch Signal

13

--

--

Not Used

14

L-GN/BK

748

Right Rear Door Ajar Switch Signal

15

L-BU/BK

747

Left Rear Door Ajar Switch Signal

16

D-BU/WH

1179

Left Rear Door Open Switch Signal

17-20

--

--

Not Used

21

YE

1491

Backlight Lamp Control

22

PU

5357

Right Tail Lamp Outage Detection Signal

23-25

--

--

Not Used

Body Control Module (BCM) C7


Object Number: 1664505  Size: CH

Connector Part Information

  • OEM: HITPB-28-G-H
  • Service: See Catalog
  • Description: 28-Way F (GY)

Terminal Part Information

  • Pins: 2
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
  • Pins: 7, 9, 22, 25, 28
  • 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

--

--

Not Used

2

L-BU

1344

Trunk Release Relay Control

3-6

--

--

Not Used

7

L-BU/BK

6692

Rear Door Lock Control

8

--

--

Not Used

9

L-BU/WH

6693

Rear Door Unlock Control

10-21

--

--

Not Used

22

D-GN

5060

Low Speed GMLAN Serial Data

23-24

--

--

Not Used

25

PU/WH

1382

LED Dimming Signal

26-27

--

--

Not Used

28

D-BU

1393

Courtesy Lamp Relay Coil Control

Data Link Connector (DLC)


Object Number: 1243575  Size: CH

Connector Part Information

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

Terminal Part Information

  • Pins: 1, 4, 5, 6, 7, 14, 16
  • 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

350

Ground

5

BK

350

Ground

6

TN/BK

2500

High Speed GMLAN Serial Data Bus +

7

WH/BK

5043

Keyword 2000 Serial Data

8-13

--

--

Not Used

14

TN

2501

High Speed GMLAN Serial Data Bus -

15

--

--

Not Used

16

OG/PK

1840

Battery Positive Voltage