GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM) C1
Table 2: Body Control Module (BCM) C2

Body Control Module (BCM) C1


Object Number: 1334541  Size: CH

Connector Part Information

    • 15359050
    • 56-Way F Mixed (BK)

Pin

Wire Color

Circuit Number

Function

A1

--

--

Not Used

A2

YE

317

Fog Lamp Relay Control

A3

L-BU

14

Left Turn Signal Lamps Supply Voltage

A4

GY/BK

690

Courtesy Lamp Supply Voltage (TR9)

A5

PK/WH

1970

Headlamp Relay Control

A6

BK

755

RAP Relay Coil Control

A7

OG

740

Battery Positive Voltage

A8

D-GN

113

Windshield Wiper Switch Signal 2

A9-A10

--

--

Not Used

A11

L-BU

244

Passenger Door Lock Switch Lock Control (AUO)

A12

WH

194

Door Unlock Control (AUO)

A13-A17

--

--

Not Used

A18

BK/WH

1969

Beam Select Relay Control

A19

D-BU

15

Right Turn Signal Lamps Supply Voltage

A20

YE

196

Windshield Wiper Motor Park Switch Signal

A21-A23

--

--

Not Used

A24

BN/WH

301

Park Lamp Relay Control

A25

BK/WH

238

Seat Belt Switch - Left

A26

OG

300

Ignition 3 Relay Control

A27-A28

--

--

Not Used

A29

OG

1732

Courtesy Lamps Supply Voltage

A30

OG

1732

Courtesy Lamps Supply Voltage

A31

L-BU

1134

Park Brake Switch Signal

A32

GY/BK

745

Left Front Door Ajar Switch Signal

A33-A37

--

--

Not Used

A38

L-GN/BK

748

Right Rear Door Ajar Switch Signal

A39

BK/WH

746

Right Rear Door Ajar Switch Signal (CREW CAB)

A40

BK

28

Horn Relay Control

A41

PU

1807

Class 2 Serial Data (UE1)

A42

PU

1807

Class 2 Serial Data

A43

D-GN/WH

762

A/C Request Signal

A44

L-BU/BK

747

Left Rear Door Ajar Switch Signal (CREW CAB)

A45

PK

849

Brake Fluid Level Sensor Signal

A46

WH

156

Courtesy Lamp Low Control

A47

PU

1807

Class 2 Serial Data

A48

BN

9

Park Lamp Supply Voltage

B1

YE

18

Left Rear Turn Signal Lamps Supply Voltage

B2

D-GN

19

Right Rear Turn Signal Lamps Supply Voltage

B3

BK/WH

1251

Ground

B4

RD

228

Windshield Washer Pump Control

B5

OG

840

Battery Positive Voltage

B6

D-BU

338

Run/Crank Voltage

B7

BN

4

Accessory Voltage

B8

OG

1340

Battery Positive Voltage

Body Control Module (BCM) C2


Object Number: 1335561  Size: CH

Connector Part Information

    • 15359049
    • 56-Way F Micro 64 GT 280 (GY)

Pin

Wire Color

Circuit Number

Function

A1

PU

524

Headlamp Dimmer Switch High Beam Signal

A2

WH

103

Headlamp Switch Headlamps On Signal

A3

GY

112

Windshield Wiper Switch Signal 1

A4

BN/WH

230

Instrument Panel Lamps Dimming Control

A5

YE

183

Front Fog Lamp Indicator Control

A6

--

--

Not Used

A7

BN/WH

301

Park Lamp Relay Control

A8

BN

1356

Flash To Pass Switch Signal

A9

PU/WH

549

Headlamp Switch Headlamps Off Signal

A10

PU

719

Low Reference

A11

D-BU/WH

1495

Dome Overide Switch Signal

A12

PU

328

Interior Lamp Switch Signal

A13

WH/BK

158

Cargo lamp Switch Signal (TR9)

A14

WH

1390

Off/Run/Crank Voltage

A15-A16

--

--

Not Used

A17

BN/WH

1571

Traction Control Switch Signal (2WD w/NW9)

A18

OG

192

Fog Lamps Enable (T96)

A19

GY

728

Security Indicator Control

A20-A24

--

--

Not Used

A25

BK

28

Horn Relay Control

A26

PU/WH

1572

TCS Requested Indicator Control (2WD w/NW9)

A27

--

--

Not Used

A28

GY

8

Instrument Panel Lamps Dimmer Switch Signal

A29

GY

8

Instrument Panel Lamps Dimmer Switch Signal

A30

--

--

Not Used

A31

BN

323

Shift Solenoid Supply Voltage

A32-A34

--

--

Not Used

A35

GY

8

Instrument Panel Lamp Dimmer Switch Signal

A36

GY

8

Instrument Panel Lamp Dimmer Switch Signal

A37

WH

278

Ambient Light Sensor Signal

A38

PU

1807

Class 2 Serial Data

A39

PU

1807

Class 2 Serial Data

A40

OG

1732

Courtesy Lamps Supply Voltage (TR9)

A41

WH

156

Courtesy Lamp Low Control (TR9)

A42

WH/BK

1073

Ignition Key Resistor Signal

A43

BK

279

Ambient Light Sensor Low Reference

A44

PU

1807

Class 2 Serial Data

A45

L-BU

1508

Turn Signal Switch Signal

A46

OG

1732

Courtesy Lamps Supply Voltage (TR9)

A47

WH

156

Courtesy Lamp Low Control (TR9)

A48

WH

111

Hazard Switch Signal

B1-B2

--

--

Not Used

B3

D-GN

19

Right Rear Turn Signal Lamps Supply Voltage

B4

YE

18

Left Rear Turn Signal Lamps Supply Voltage

B5

RD

228

Windshield Washer Pump Control

B6

--

--

Not Used

B7

BN

4

Accessory Voltage

B8

D-BU

338

Run/Crank Voltage