GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM) - C1
Table 2: Body Control Module (BCM) - C2
Table 3: Body Control Module (BCM) - C3
Table 4: Body Control Module (BCM) - C4
Table 5: Body Control Module (BCM) - C5
Table 6: Body Control Module (BCM) - C6
Table 7: Data Link Connector (DLC)
Table 8: Splice Pack - SP205
Table 9: Splice Pack - SP206
Table 10: Splice Pack - SP207

Body Control Module (BCM) - C1


Object Number: 40446  Size: CH

Connector Part Information

    • 12177194
    • 6-Way F Metri-Pack 150 Series (NA)

Pin

Wire Color

Circuit No.

Function

A

RD

2353

Instrument Panel Lamps Dimming Supply Voltage

B

PU/WH

1382

LED Dimming Signal

C

OG

4040

Battery Positive Voltage

D

OG

1732

Inadvertent Power Courtesy Lamps Supply Voltage

E

BN/WH

230

Instrument Panel Lamps Dimming Control

F

OG

2240

Battery Positive Voltage

Body Control Module (BCM) - C2


Object Number: 73156  Size: CH

Connector Part Information

    • 12110088
    • 24-Way F Micro-Pack 100 Series (GY)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

D-BU

1796

Steering Wheel Radio Controls Supply Voltage

A3

TN/BK

254

Rear Door Unlock Relay Control

A4

PK/WH

1970

Headlamp Low Beam Relay Control

A5

D-GN/WH

1317

Fog Lamp Relay Control

A6

GY/BK

255

Rear Door Lock Relay Control

A7

--

--

Not Used

A8

WH

193

Rear Defog Relay Control

A9-A10

--

--

Not Used

A11

RD/WH

812

12-Volt Reference

A12

OG

1140

Battery Positive Voltage

B1

BK/WH

1969

Headlamp High Beam Relay Control

B2

WH

1080

Park Lamp Relay Control

B3

D-BU

1353

RAP Supply Voltage

B4

L-GN/BK

592

DRL Relay Control

B5

PU

359

DRL Off Indicator Control

YE

1977

Rear Fog Lamp Relay Control (Export)

B6

BK/WH

1851

Ground

B7

BK

1835

Security System Sensor Low Reference

B8

PK

1348

Headlamp On Indicator Control

B9

BK

28

Horn Relay Control

B10

WH

1304

Liftgate Lock Relay Control (w/E52)

B11

GY

1056

Dimmer Switch 5-Volt Reference Voltage

B12

L-GN

1037

BCM Class 2 Serial Data

Body Control Module (BCM) - C3


Object Number: 255037  Size: CH

Connector Part Information

    • 12160778
    • 24-Way F Micro-Pack 100 Series (BN)

Pin

Wire Color

Circuit No.

Function

A1-A3

--

--

Not Used

A4

WH

278

Ambient Light Sensor Signal

A5

GY

1548

Passenger Sunload Sensor Signal (w/CJ2)

A6

YE

1836

Security System Sensor Signal

--

--

Not Used (Export)

A7

L-GN

1011

Remote Radio Control Signal

A8

D-GN

588

DRL Switch Signal

A9

OG

192

Front Fog Lamp Switch Signal

A10

--

--

Not Used

A11

PU

328

Interior Lamp Defeat Switch Signal

A12

--

--

Not Used

B1

--

--

Not Used

B2

GY/BK

308

Park Lamp Switch Signal

B3-B4

--

--

Not Used

B5

L-BU/BK

590

Driver Sunload Sensor Signal (w/CJ2)

B6

BK/WH

1851

Ground

B7

L-BU

1059

Steering Wheel Position Sensor Signal (NYS, JL4)

B8

OG/BK

2090

Dimming Switch Signal

B9

L-GN

11

Headlamp Dimmer Switch Signal

B10

L-BU

187

Rear Fog Lamp Indicator Control (Export)

--

--

Not Used

B11

L-BU

553

Tow/Haul Switch Signal

B12

--

--

Not Used

Body Control Module (BCM) - C4


Object Number: 130690  Size: CH

Connector Part Information

    • 12110206
    • 24-Way F Micro-Pack 100 Series (L-BU)

Pin

Wire Color

Circuit No.

Function

A1

L-GN

80

Key In Ignition Switch Signal

A2

YE

307

Headlamp Switch Flash to Pass Signal

A3

WH

530

Off/Run/Crank Voltage

A4

PK

39

Ignition 1 Voltage

A5

--

--

Not Used

A6

D-BU/WH

149

Cargo Lamp Low Control (Avalanche/Escalade EXT)

--

--

Not Used

A7

L-BU

1134

Park Brake Switch Signal

A8

GY

1524

Backup Lamp Signal

A9-A11

--

--

Not Used

A12

WH

103

Headlamp Switch Headlamps On Signal

B1-B2

--

--

Not Used

B3

YE

43

Accessory Voltage

B4-B5

--

--

Not Used

B6

GY/BK

2226

Instrument Panel Lamps Dimmer Switch Low Reference

B7

BK

279

Ambient Light Sensor Low Reference

B8

--

--

Not Used

B9

D-BU/WH

1495

Courtesy Lamps On Signal

B10-B12

--

--

Not Used

Body Control Module (BCM) - C5


Object Number: 304345  Size: CH

Connector Part Information

    • 12177195
    • 6-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A-C

--

--

Not Used

D

OG

2140

Battery Positive Voltage

E

GY/BK

690

Courtesy Lamp Control

F

L-GN

24

Backup Lamp Supply Voltage

Body Control Module (BCM) - C6


Object Number: 362758  Size: CH

Connector Part Information

    • 12191375
    • 16-Way F Micro-Pack 100 Series (PU)

Pin

Wire Color

Circuit No.

Function

A1

PK/BK

1303

Liftgate Ajar Switch Signal (ZW9)

A2

L-GN/BK

748

Right Rear Door Ajar Switch Signal

A3

L-BU/BK

747

Left Rear Door Ajar Switch Signal

A4

--

--

Not Used

A5

L-BU

2265

Power Window Lockout Left Rear Control

A6

L-GN

2266

Power Window Lockout Right Rear Control

A7

GY/BK

1186

Power Window Relay Right Rear Up Control

A8

D-GN

1188

Power Window Relay Right Rear Down Control

B1

L-BU

2380

Rear Parking Assist Chime Signal

B2-B6

--

--

Not Used

B7

YE

1187

Power Window Relay Left Rear Down Control

B8

WH

1185

Power Window Relay Left Rear Up Control

Data Link Connector (DLC)


Object Number: 68793  Size: CH

Connector Part Information

    • 12110250
    • 16-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PU

1132

DLC Class 2 Serial Data

3

--

--

Not Used

4

BK

1050

Ground

5

BK/WH

1851

Ground

6-15

--

--

Not Used

16

OG

640

Battery Positive Voltage

Splice Pack - SP205


Object Number: 831366  Size: CH

Connector Part Information

    • 15305291
    • 12-Way F Metri-Pack 280 Series Splice Saver DBL (BK)

Pin

Wire Color

Circuit No.

Function

A

OG

1044

Radio Class 2 Serial Data

PK

1045

Serial Communications Circuit

B

D-GN

1049

PCM Class 2 Serial Data

C

D-GN/WH

1133

ATC Class 2 Serial Data (NP8/NR4)

L-BU

1122

ABS Class 2 Serial Data

D

PU

1132

DLC Class 2 Serial Data

PU

1807

Class 2 Serial Data (Primary) (w/T89)

E

WH

1038

HVAC Class 2 Serial Data

F

TN

1047

PDM Class 2 Serial Data

G

GY

1036

IPC Class 2 Serial Data

H

D-BU/WH

2218

Serial Communications Circuit

J

GY

2567

Rear Wheel Steering Control Module Class 2 Serial Data (NYS)

K

--

--

Not Used

L

BN

1046

DDM Class 2 Serial Data

M

L-GN

1037

BCM Class 2 Serial Data

Splice Pack - SP206


Object Number: 726823  Size: CH

Connector Part Information

    • 12191910
    • 6-Way F GT 150 Series Splice Saver Sealed (BK)

Pin

Wire Color

Circuit No.

Function

A

D-BU/WH

1126

SCM (Suspension) Class 2 Serial Data (Z55)

B

D-BU

1128

SDM Class 2 Serial Data

C

BN/WH

1048

SCM (Seat) Class 2 Serial Data (AN3)

D

--

--

Not Used

E

GY

2289

Rear HVAC/Audio Class 2 Serial Data

F

D-BU/WH

2218

Serial Communications Circuit

Splice Pack - SP207


Object Number: 338576  Size: CH

Connector Part Information

    • 12191216
    • 12-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

PK

1045

RFA Class 2 Serial Data

C

YE

1127

Trip Computer/Nav Class 2 Serial Data (UE1)

D

TN

5072

Remote Playback Device Class 2 Serial Data

E

--

--

Not Used

F

D-BU

2272

Amplifier Class 2 Serial Data (Y91)

G

L-BU

2288

LGM Class 2 Serial Data

H

L-GN/BK

1098

VCM (Vehicle Communication) Class 2 Serial Data (U42)

J

--

--

Not Used

K

L-GN

2271

ADG Class 2 Serial Data

L-M

--

--

Not Used