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 (PRP)

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

YE

1491

Backlight Lamps Control

B

PU/WH

1382

LED Dimming Signal

C

OG

4040

Battery Positive Voltage

D

OG

1732

Inadvertent Power Supply Voltage

E

BN/WH

230

Instrument Panel Lamps Dimming Control

F

RD/WH

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-A2

--

--

Not Used

A3

L-BU

244

Passenger Door Lock Switch Lock Control (AU3)

A4

PK/WH

1970

Headlamp Low Beam Relay Control

A5

WH

111

Hazard Switch Signal

A6

D-BU

245

Passenger Door Lock Switch Unlock Control (AU3)

A7

L-GN

1391

Driver Door Unlock Relay Control (AU3)

A8

L-BU

1344

Cargo Door Release Relay Control (AU3)

A9-A10

--

--

Not Used

A11

OG/WH

812

12-Volt Reference

A12

RD/WH

1140

Battery Positive Voltage

B1

TN/WH

1969

Headlamp High Beam Relay Control

B2

WH

1080

Park Lamp Relay Control

B3

TN

755

RAP Relay Coil Control (A31)

B4

L-GN/BK

592

DRL Low Control

B5

--

--

Not Used

B6

BK/WH

351

Ground

B7

TN

1835

Security System Sensor Low Reference

B8

PK

1348

Headlamp On Indicator Supply Voltage

B9

TN

28

Horn Relay Control

B10

--

--

Not Used

B11

GY

705

5-Volt Reference

B12

L-GN

1037

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-A5

--

--

Not Used

A6

YE

1836

Security System Sensor Signal

A7

--

--

Not Used

A8

D-GN

306

DRL On/Off Signal

A9-A10

--

--

Not Used

A11

PU

328

Interior Lamp Defeat Switch Signal

A12

--

--

Not Used

B1

YE

710

Class 2 Serial Data (Early Production)

B2

BN/WH

301

Park Lamp Switch On Signal

B3-B5

--

--

Not Used

B6

BK/WH

351

Ground

B7

--

--

Not Used

B8

OG/BK

2090

Dimming Input

B9

L-GN

11

Headlamp Dimmer Switch Signal

B10

--

--

Not Used

B11

L-BU

1788

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

PK

1020

Ignition 0 Voltage

A4

PK

39

Ignition 1 Voltage

A5

L-GN

1177

Door Open Switch Signal

A6

--

--

Not Used

A7

L-BU

1134

Park Brake Switch Signal

A8-A9

--

--

Not Used

A10

YE/BK

1181

Rear Door Open Switch Signal (Passenger/Cargo)

A11

--

--

Not Used

A12

WH

103

Headlamp Switch Headlamps On Signal

B1-B2

--

--

Not Used

B3

YE

343

Accessory Voltage

B4

TN

126

Left Front Door Open Switch Signal

B5

L-BU

195

Door Lock Control (AU3)

B6

GY/BK

2226

Dimming Return

B7-B8

--

--

Not Used

B9

D-BU/WH

1495

Courtesy Lamps On Signal

B10

WH

194

Door Unlock Control (AU3)

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

RD/WH

2140

Battery Positive Voltage

E

D-BU/WH

149

Courtesy Lamp Supply Voltage - w/o YF7

GY/BK

690

Courtesy Lamp High Control - w/YF7

F

L-GN

24

Backup Lamp Supply Voltage

Body Control Module (BCM) - C6 (PRP)


Object Number: 362758  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

D-BU/WH

149

Dome Fluorescent Work Lamp Signal (UF2)

A2-A6

--

--

Not Used

A7

L-BU

1344

Access Panel Right Side Relay Control

A8

GY/BK

690

Dome Fluorescent Work Lamp Relay Control (UF2)

B1-B6

--

--

Not Used

B7

L-GN

1391

Access Panel Left Side Rear Relay Control

B8

L-BU

244

Access Panel Left Side Front Relay Control