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 - SP207 (w/o Y91)
Table 10: Splice Pack - SP207 (Y91)

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 (UK3)

A3

D-BU

245

Passenger Door Lock Switch Unlock Control - Base

TN/BK

254

Rear Door Unlock Relay Control - Uplevel

A4

PK/WH

1970

Headlamp Low Beam Relay Control

A5

D-GN/WH

1317

Fog Lamp Relay Control

A6

L-BU

244

Passenger Door Lock Switch Lock Control - Base

GY/BK

255

Rear Door Lock Relay Control - Uplevel

A7

--

--

Not Used - Uplevel

L-GN

1391

Driver Door Unlock Relay Control - Base

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

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

--

--

Not Used

B11

GY

1056

Dimming Potentiometer 5-Volt Reference

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

--

--

Not Used - w/o CJ2

GY

1548

Passenger Sunload Sensor Signal - CJ2

A6

YE

1836

Security System Sensor Signal

A7

--

--

Not Used - Base

L-GN

1011

Remote Radio Control Signal (UK3)

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

--

--

Not Used - w/o CJ2

L-BU/BK

590

Driver Sunload Sensor Signal - CJ2

B6

BK/WH

1851

Ground

B7

--

--

Not Used

L-BU

1059

Steering Wheel Position Sensor Signal - NYS

B8

OG/BK

2090

Dimming Switch Signal

B9

L-GN

11

Headlamp Dimmer Switch Signal

B10

--

--

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 - Uplevel

BK/WH

746

Right Front Door Ajar Switch Signal - Base

A6

D-BU/WH

149

Cargo Lamp Low Control

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

--

--

Not Used - Uplevel

GY/BK

745

Left Front Door Ajar Switch Signal - Base

B5

--

--

Not Used - Uplevel

L-BU

195

Door Lock Control - Base

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

--

--

Not Used - Uplevel

WH

194

Door Unlock Control - Base

B11-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

--

--

Not Used

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

--

--

Not Used - Base

L-BU

2265

Power Window Lockout Left Rear Control - Uplevel

A6

--

--

Not Used - Base

L-GN

2266

Power Window Lockout Right Rear Control - Uplevel

A7

--

--

Not Used - Base

GY/BK

1186

Power Window Relay Right Rear Up Control - Uplevel

A8

--

--

Not Used - Base

D-GN

1188

Power Window Relay Right Rear Down Control - Uplevel

B1-B6

--

--

Not Used

B7

--

--

Not Used - Base

YE

1187

Power Window Relay Left Rear Down Control - Uplevel

B8

--

--

Not Used - Base

WH

1185

Power Window Relay Left Rear Up Control - Uplevel

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

--

--

Not Used - w/o HP2

TN/WH

2500

High Speed GM LAN Serial Data (+) - HP2

7-13

--

--

Not Used

14

--

--

Not Used - w/o HP2

TN

2501

High Speed GM LAN Serial Data (-) - HP2

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 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/ECM Class 2 Serial Data

C

D-GN/WH

1133

ATC Class 2 Serial Data (NP1/NP8)

L-BU

1122

ABS Class 2 Serial Data

D

PU

1132

DLC Class 2 Serial Data

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

YE

2470

Allison Class 2 Serial Data - M74

OG/BK

6752

Generator Battery Control Module Class 2 Serial Data - Except 8.1L and HP2

PU/WH

5687

Class 2 Serial Data - HP2

L

BN

1046

DDM Class 2 Serial Data

M

L-GN

1037

BCM Class 2 Serial Data

Splice Pack - SP207 (w/o Y91)


Object Number: 338576  Size: CH

Connector Part Information

    • 12176461
    • 12-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit Number

Function

A

--

--

Not Used

B

PK

1045

RFA Class 2 Serial Data

C

YE

1127

Trip Computer/Navigation Class 2 Serial Data - UE1

D-F

--

--

Not Used

G

L-BU

2288

LGM Class 2 Serial Data - UK6

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 - U2K

L-M

--

--

Not Used

Splice Pack - SP207 (Y91)


Object Number: 338576  Size: CH

Connector Part Information

    • 12176461
    • 12-Way F Metri-Pack 150 Series (BK)

Pin

Wire Color

Circuit Number

Function

A

--

--

Not Used

B

PK

1045

RFA Class 2 Serial Data

C

YE

1127

Trip Computer/Navigation Class 2 Serial Data

D

TN

5072

Remote Playback Device Class 2 Serial Data - U1S

E

--

--

Not Used

F

D-BU

2272

Amplifier Class 2 Serial Data

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 - U2K

L-M

--

--

Not Used