For 1990-2009 cars

#### Body Control Module (BCM) C1

Connector Part Information |

• | 12084945

• | 16 Way F Micro- Pack 100 Series (GY)

Pin | Wire Color | Circuit Number | Function
--- | --- | --- | ---
A1 | -- | -- | Not Used
A2 | L-GN | 1391 | Driver Door Unlock Relay Control
A3 | L-BU | 195 | Door Lock Control
A4 | WH | 194 | Door Unlock Relay Coil Supply Voltage
A5-A6 | -- | -- | Not Used
A7 | OG/BK | 781 | Driver Door Lock Switch Unlock Signal
A8 | RD/BK | 780 | Driver Door Lock Switch Lock Signal
B1 | -- | -- | Not Used
B2 | PK | 1200 | Headlamp High Beam Ground
B3 | -- | -- | Not Used
B4 | L-BU | 74 | Park Lamp Switch Signal
B5 | -- | -- | Not Used
B6 | L-GN/BK | 1137 | DRL Ambient Light Sensor Signal
B7 | YE/BK | 1138 | DRL Ambient Light Sensor Low Reference
B8 | L-GN | 66 | A/C Request Signal

#### Body Control Module (BCM) C2

Connector Part Information |

• | 12110088

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

Pin | Wire Color | Circuit Number | Function
--- | --- | --- | ---
A1 | L-GN | 867 | ABS Indicator Failure Control
A2 | L-BU | 1134 | Park Brake Switch Signal
A3 | D-BU | 1201 | Headlamp Low Beam Ground
A4 | WH | 1579 | Oil Life Reset Switch Signal
A5 | PU | 333 | Brake Fluid Level Sensor Signal
A6 | BN | 96 | Windshield Wiper Switch Pulse Delay Signal
A7 | L-BU | 832 | Traction Control Active Signal
A8 | PK | 94 | Rear Wiper Switch Signal
A9 | RD | 228 | Windshield Washer Pump Signal
A10 | PK | 339 | Ignition 1 Voltage
A11 | L-GN | 80 | Key In Ignition Switch Signal
A12 | BK/WH | 746 | Right Front Door Ajar Switch Signal
B1 | D-GN | 264 | Security Indicator Supply Voltage
B2 | GY/BK | 745 | Left Front Door Ajar Switch Signal
B3 | L-BU | 292 | Rear Defog Switch Signal
B4 | RD/BK | 744 | Rear Compartment Lid Adjar Switch
B5 | D-GN | 392 | Rear Window Washer Switch Signal
B6 | WH | 2192 | Traction Ready Indicator Control
B7 | BK/WH | 56 | Trunk/Liftgate Release Switch Signal
B8 | BK/WH | 99 | Windshield Washer Fluid Level Signal
B9 | YE | 743 | Accessory Voltage
B10 | BN | 9 | Park Lamp Supply Voltage
B11 | L-GN | 1478 | Coolant Level Switch Signal
B12 | -- | -- | Not Used

#### Body Control Module (BCM) C3

Connector Part Information |

• | 12110244

• | 24 Way F Micro-Pack 100 Series (PK)

Pin | Wire Color | Circuit Number | Function
--- | --- | --- | ---
A1 | WH | 156 | Courtesy Lamp Low Control
A2 | RD/WH | 812 | 12 Volt Reference
A3 | WH | 352 | Headlamp Relay Coil Supply Voltage
A4 | D-BU | 1660 | Traction Control Indicator Control
A5 | OG/BK | 1445 | BCM Program Enable Signal
A6 | OG/BK | 1445 | BCM Program Enable Signal
A7 | WH | 1080 | Park Lamp Relay Control
A8 | L-GN/BK | 592 | DRL Relay Control
A9 | GY | 1359 | LCD Backlighting Lamp Control
A10 | PU | 1807 | Class 2 Serial Data
A11 | -- | -- | Not Used
A12 | TN | 2501 | High Speed GMLAN Serial Data Bus-
B1 | TN/WH | 816 | A/T Shift Lock Solenoid Supply Voltage
B2 | BK | 28 | Horn Relay Control
B3 | OG/BK | 1057 | Low Reference
B4 | GY | 112 | Windshield Wiper Switch Signal 1
B5 | GY/BK | 1381 | LCD Dimming Signal
B6 | WH | 193 | Rear Defog Relay Control
B7 | YE | 1836 | Security System Sensor Signal
B8 | D-GN | 113 | Windshield Wiper Switch Signal 2
B9 | PU | 1807 | Class 2 Serial Data
B10 | PU | 1807 | Class 2 Serial Data
B11 | TN/WH | 2500 | High Speed GMLAN Serial Data Bus+
B12 | -- | -- | Not Used

#### Body Control Module (BCM) C4

Connector Part Information |

• | 12110626

• | 8 Way Metri-Pack 280 Series (L-GY)

Pin | Wire Color | Circuit Number | Function
--- | --- | --- | ---
A | OG | 1732 | Courtesy Lamps Supply Voltage
B-C | -- | -- | Not Used
D | OG | 2540 | Battery Positive Voltage
E | GY | 8 | Instrument Panel Lamp Supply Voltage
F | BK | 550 | Ground
G | GY | 382 | Trunk Release Enable Relay Switch Supply Voltage
H | OG | 1640 | Battery Positive Voltage