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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1392 (BODY CONTROL SYSTEM)COMPONENT LOCATORBODY CONTROL SYSTEM CONNECTORS
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Body Control System Connectors

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Body Control System Connectors
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Body Control Module (BCM) C1 Connector End Views

GM73156Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12110088
  • 24-Way F Micro-Pack 100 Series (L-GY)
Pin Wire Color Circuit No. Function
A1 - - Not Used
A2 WH 2282 Headlamp Washer Relay Control (CE4)
A3 OG 1140 Battery Positive Voltage
A4 BK/WH 1969 Headlamp High Beam Relay Control
A5 PK/WH 1970 Headlamp Low Beam Relay Control
A6 PK 5363 Incline Sensor Alarm Signal (BAE)
A7-A8 - - Not Used
A9 TN 5458 Midgate Overhead Console Switch Up Signal (Z88)
A10-A11 - - Not Used
A12 WH 278 Ambient Light Sensor Signal
B1 L-GN 1037 BCM Class 2 Serial Data
B2 BK 279 Ambient Light Sensor Low Reference
B3 L-GN 2270 Rear Window Washer Relay Control
B4 GY/BK 2226 Instrument Panel Lamps Dimmer Switch Low Reference
B5 GY 705 5-Volt Reference
B6 WH 2283 Rear Wiper/Washer Switch Supply Voltage
B7 OG/BK 2090 Courtesy Lamps Supply Voltage
B8 L-GN 1011 Remote Radio Control Signal
B9 GY 391 Rear Window Wiper Switch Signal
B10 YE 1836 Security System Sensor Signal
B11 GY 2521 Right Sunload Sensor Signal
B12 L-BU/BK 2519 Left Sunload Sensor Signal
Body Control Module (BCM) C2 Connector End Views

GM646417Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12110112
  • 32-Way F Micro-Pack 100 (TN)
Pin Wire Color Circuit No. Function
E1-E2 - - Not Used
E3 L-GN 80 Key In Ignition Switch Signal
E4 YE 307 Headlamp Switch Flash to Pass Signal
E5 GY/BK 308 Park Lamp Switch Signal
E6 PK/BK 109 Hood Ajar Switch Signal (UA2)
E7 PK 1348 Headlamp On Indicator Control
E8 BK 1835 Security System Sensor Low Reference
E9 RD/WH 812 12-Volt Reference
E10 - - Not Used
E11 DK GN/
WH		 1317 Fog Lamp Relay Control (T96)
E12 BK 28 Horn Relay Control
E13 - - Not Used
E14 TN 5463 DRL Defeat On Indicator Control
E15-E16 - - Not Used
F1-F2 - - Not Used
F3 D-GN 113 Windshield Wiper Switch Signal 2
F4 D-BU/WH 1495 Courtesy Lamps On Signal
F5 BN/WH 1871 Headlamp Washer Switch Signal (CE4)
F6 OG 192 Front Fog Lamps Switch Signal (T96)
F7 L-BU 187 Rear Fog Lamps Switch Signal (T79)
F8 L-GN 5462 DRL Defeat Switch Signal
F9 WH 103 Headlamp Switch Headlamps On Signal
F10 L-GN 11 Headlamp High Beam Supply Voltage
F11 PU 328 Interior Lamp Defeat Switch Signal
F12 D-BU 6252 Midgate Ajar Indicator Switch (Z88)
F13 PK 5068 Intrusion Sensor Switch Disable Signal (BAE)
F14 YE 710 Class 2 Serial Data
F15-F16 - - Not Used
Body Control Module (BCM) C3 Connector End Views

GM697009Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15354796
  • 40-Way Flat Wire
Pin Wire Color Circuit No. Function
A1 FW 2140 Battery Positive Voltage
A2 FW 2140 Battery Positive Voltage
A3 FW 748 Right Rear Door Ajar Switch Signal
A4 FW 1134 Park Brake Switch Signal
A5 FW 195 Door Lock Relay Control
A6 FW 2265 Power Window Lockout Left Rear Control
A7 - - Not Used
A8 - 747 Left Rear Door Ajar Switch Signal
A9- A10 - - Not Used
A11 FW 1350 Ground
A12 FW 1351 RAP Relay Supply Voltage
A13 FW 194 Door Unlock Relay Control
A14 FW 1080 Park Lamp Relay Control
A15 FW 5168 Power Sounder Enable Signal (BAE)
A16 FW 5204 Intrusion Sensor Data Signal
A17 - - Not Used
A18 FW 1390 Ignition 0 Voltage
A19 FW 39 Ignition 1 Voltage
A20 FW 541 Ignition 3 Voltage
B1 FW 230 Instrument Panel Lamps Dimming Control
B2 FW 230 Instrument Panel Lamps Dimming Control
B3 FW 690 Courtesy Lamp Supply Voltage
B4 FW 2240 Battery Positive Voltage
B5 FW 1186 Power Window Switch Right Rear Up Signal
B6 FW 2266 Power Window Lockout Right Rear Control
B7 FW 1188 Power Window Switch Right Rear Down Signal
B8 FW 1185 Power Window Switch Left Rear Up Signal
B9 FW 1187 Power Window Switch Left Rear Down Signal
B10 - - Not Used
B11 FW 1350 Ground
B12 FW 24 Backup Lamp Supply Voltage
B13 FW 4440 Battery Positive Voltage
B14 FW 1382 LED Dimming Signal
B15 FW 543 Accessory Voltage
B16 - - Not Used
B17 FW 4040 Battery Positive Voltage
B18 FW 1732 Courtesy Lamps Supply Voltage
B19 FW 1977 Rear Fog Lamp Relay and Indicator Control
B20 FW 5362 Incline Sensor Alarm On Signal (BAE)
RENDER: 1.0x

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