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: Inadvertent Power Relay

Body Control Module (BCM) C1


Object Number: 255037  Size: CH

Connector Part Information

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

Pin

Wire Color

Circuit No.

Function

A1

PPL

1807

Class 2 Serial Data

A2

PPL

1807

Class 2 Serial Data

A3

YEL

43

Accessory Voltage

A4

LT GRN

265

Passenger Door Key Switch Signal

A5

BLK

746

Right Front Door Ajar Switch Signal

A6

DK BLU/WHT

727

Right Front Door Open Switch Signal

A7

LT BLU

263

Tamper Switch Signal

A8

DK BLU

245

Passenger Door Lock Switch Unlock Signal

A9

LT BLU

244

Passenger Door Lock Switch Lock Signal

A10

TAN

126

Left Front Door Open Switch Signal

A11

--

--

Not Used

A12

BLK

1051

Ground

B1

ORN

2640

Battery Positive Voltage

B2

--

--

Not Used

B3

PNK

1039

Ignition 1 Voltage

B4

LT GRN

262

Driver Door Key Switch Signal

B5

DK BLU/WHT

1355

Valet Mode Switch Signal

B6

GRY/BLK

745

Left Front Door Ajar Switch Signal

B7

--

--

Not Used

B8

ORN/BLK

781

Driver Door Lock Switch Unlock Signal

B9

RED/BLK

780

Driver Door Lock Switch Lock Signal

B10

RED/BLK

744

Trunk Ajar Switch Signal

B11

BLK

552

Low Reference

B12

PPL/WHT

30

Fuel Level Sensor Signal

Body Control Module (BCM) C2


Object Number: 328562  Size: CH

Connector Part Information

    • 12160779
    • 32-Way F Micro-Pack 100 Series (BRN)

Pin

Wire Color

Circuit No.

Function

C1

--

--

Not Used

C2

ORN

2540

Battery Positive Voltage (B+) Output

C3

BRN

247

Inadvertant Power Relay Control

C4

BLK

28

Horn Relay Control

C5

WHT

194

Door Unlock Control

C6

GRY/BLK

308

Park Lamps Switch On Input

C7-C8

--

--

Not Used

C9

YEL

10

Headlamp Switch Signal

C10

DK GRN/WHT

1317

Fog Lamp Relay Control

C11

--

--

Not Used

C12

WHT

93

Fuel Door Release Relay Control

C13

LT GRN

147

Off/Run Voltage

C14

LT BLU

195

Door Lock Control

C15

ORN/BLK

434

Neutral Safety Switch Signal

C16

WHT

352

Headlamp Relay Coil Supply Voltage

D1

BLK

1051

Ground

D2-D3

--

--

Not Used

D4

BLK

707

RAP Relay Coil Control

D5

LT GRN/BLK

592

DRL Relay Control

D6

LT GRN

1391

Left Front Door Lock Relay Control

D7

DK BLU

1393

Interior Lamp Relay Coil Control

D8

--

--

Not Used

D9

WHT

193

Rear Defog Relay Control

D10

BLK/WHT

1969

Headlamp High Beam Relay Control

D11-D12

--

--

Not Used

D13

LT BLU

1344

Trunk Release Relay Control

D14

DK GRN

646

Reverse Relay Control

D15

BLK

755

Controlled Power Relay Control

D16

--

--

Not Used

Inadvertent Power Relay


Object Number: 281201  Size: CH

Connector Part Information

    • 12110541
    • 6-Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A1

ORN

1740

Battery Positive Voltage

A2

PPL/WHT

65

Blower Motor Supply Voltage

B1- B2

--

--

Not Used

C1

RED

542

Battery Positive Voltage

C2

BRN

247

Blower Enable Relay Control