2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 VFACTORY OEM SERVICE PROCEDURE

Body Control Module (BCM) - C3

Body Control Module (BCM) - C3

GM255037Courtesy of GENERAL MOTORS CORP.
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 - - Not Used
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
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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