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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 682 (BODY CONTROL SYSTEM)COMPONENT LOCATORBODY CONTROL SYSTEM CONNECTOR END VIEWS
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Body Control System Connector End Views

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Body Control System Connector End Views
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Body Control Module (BCM) Connector End View - C1

GM255037Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12160778
  • 24-Way F Micro-Pack 100 Series (BRN)
Pin Wire Color Circuit No. Function
A1 BLK 1850 Ground
A2 ORN 1140 Battery Positive Voltage
A3 WHT 194 Door Unlock Control
A4 LT BLU 195 Door Lock Control
A5 BRN 1295 Variable Effort Steering Actuator Control
A6 WHT 1294 Variable Effort Steering Actuator Supply Voltage
A7 BLK 755 RAP Relay Coil Control
A8 DK BLU 1393 Inadvertent Power Relay Control
A9 BLK 28 Horn Relay Control
A10 - - Not Used
A11 LT GRN/
BLK		 592 DRL Relay Control
A12 LT GRN 1037 BCM Class 2 Serial Data
B1 BLK 1850 Ground
B2 PNK 39 Ignition 1 Voltage
B3 RED/WHT 812 12 Volt Reference
B4 ORN 461 GMCM Serial Data
B5 GRY 705 5 Volt Reference
B6 LT BLU 14 Left Turn Signal Lamps Supply Voltage
B7 DK BLU 15 Right Turn Signal Lamps Supply Voltage
B8 - - Not Used
B9 BRN 41 Ignition 3 Voltage
B10 LT BLU 1134 Park Brake Switch Signal
B11 BLK/WHT 238 Seat Belt Switch - Left
B12 LT BLU 553 Tow/Haul Switch Signal
Body Control Module (BCM) Connector End View - C2

GM130690Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12110206
  • 24-Way F Micro-Pack 100 Series (LT BLU)
Pin Wire Color Circuit No. Function
A1 YEL 710 Class 2 Serial Data
A2 ORN/BLK 1057 Low Reference
A3 GRY/BLK 690 Courtesy Lamp Relay Control
A4 LT GRN 1391 Left Front Door Lock Relay Control
A5 WHT 1080 Park Lamp Relay Control
A6 - - Not Used
A7 DK GRN/
WHT		 1317 Fog Lamp Relay Control
A8 DK GRN 1655 Exterior Courtesy Lamps Relay Control
A9-A10 - - Not Used
A11 WHT 352 Headlamp Relay Coil Supply Voltage
A12 PPL/WHT 1382 LED Dimming Signal
B1 DK GRN/
WHT		 817 Vehicle Speed Signal
B2 LT BLU 1059 Steering Wheel Position Sensor Signal
B3 YEL 1836 Security System Sensor Signal
B4 - - Not Used
B5 PPL 524 Headlamp Dimmer Switch High Beam Signal
B6 BRN 2409 Interior Park Lamps Supply Voltage
B7-B8 - - Not Used
B9 LT GRN 80 Key In Ignition Switch Signal
B10 PNK/BLK 1303 RAP Fuse Supply Voltage
B11 DK BLU/
WHT		 727 Secondary Door Latch Switch Signal
B12 ORN 1732 Courtesy Lamps Supply Voltage
Body Control Module (BCM) Connector End View - C3

GM362758Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191375
  • 16-Way F Micro-Pack 100 Series (PPL)
Pin Wire Color Circuit No. Function
A1 DK BLU/
WHT		 149 Cargo Lamp Low Control
A2 DK BLU/
WHT		 1495 Interior Lamp Control
A3 BRN 1356 Flash to Pass Switch Signal
A4 GRY 705 5 Volt Reference
A5 GRY 8 Instrument Panel Lamp Supply Voltage - 1
A6 WHT 278 Ambient Light Sensor Signal
A7-A8 - - Not Used
B1 - - Not Used
B2 LT GRN/
BLK		 394 Left Front Door Handle Switch Signal
B3 LT GRN 262 Driver Door Key Switch Signal
B4 TAN 126 Left Front Door Open Switch Signal
B5 ORN 192 Front Fog Lamp Switch Signal
B6 PPL 328 Interior Lamp Defeat Switch Signal
B8 - - Not Used
RENDER: 1.0x

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