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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 841 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - A/C COMPRESSOR THROUGH ELECTRONIC POWER STEERING MODULE X1)COMPONENT CONNECTOR END VIEWSBODY CONTROL MODULE (BCM) X1
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Body Control Module (BCM) X1

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Body Control Module (BCM) X1
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control Module (BCM) X1 Connector End View
GM1664495Courtesy of GENERAL MOTORS CORP.
Body Control Module (BCM) X1

Pin Wire Circuit Function
1 - - Not Used
2 0.35 PK/BK 1020 Ignition Voltage
3 0.35 GY 1884 Cruise Control Switch Signal
4 0.35 WH 530 5-Volt Reference
5 0.35 L-GN 1715 Windshield Wiper Switch High Signal
6 0.35 L-GN 6818 Steering Wheel Control Switch Signal
7 - - Not Used
8 0.35 TN/BK 6009 Low Reference
9 0.35 L-BU 1714 Windshield Wiper Switch Low Signal
10-13 - - Not Used
14 0.35 PK 3 Ignition Voltage
15 0.35 D-GN 663 Hazard Switch Left Turn Signal
16 0.35 TN 664 Hazard Switch Right Turn Signal
17 0.35 PK 1444 12-Volt Reference
18 0.35 YE 525 Headlamp Dimmer Switch Signal
19 0.35 WH 111 Hazard Switch Signal
20 0.35 PU 5526 Tap Up/Tap Down Switch Signal
21 0.35 BN 4 Ignition Voltage
22 - - Not Used
23 0.35 L-BU 553 Tow/Haul Switch Signal (MYC or MYD)
24 0.35 PK 94 Windshield Washer Switch Signal
25 0.35 YE 307 Headlamp Flash to Pass Signal
26 0.35 TN/WH 816 A/T Shift Lock Solenoid Control
27 - - Not Used
Connector Part Information
  • Harness Type: Steering Column
  • OEM Connector: 15482789
  • Service Connector: 88988838
  • Description: 27-Way F Receptacle 0.64 2.8 (L-GN)
Terminal Part Information
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)
RENDER: 1.0x

NO RELATED

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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.