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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1860 (WIRING SYSTEMS AND POWER MANAGEMENT - ELECTRICAL CENTER IDENTIFICATION, COMPONENT CONNECTOR & SPLICE PACK CONNECTOR END VIEWS)COMPONENT CONNECTOR END VIEWSBODY CONTROL MODULE (BCM) X3
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Body Control Module (BCM) X3

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Body Control Module (BCM) X3
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Body Control Module (BCM) X3 - Connector End View
GM1664498Courtesy of GENERAL MOTORS CORP.
Body Control Module (BCM) X3

Pin Wire Circuit Function
1 0.8 BK/WH 351 Ground
2 0.8 RD/WH 2140 Battery Positive Voltage
3 0.5 RD/WH 3840 Battery Positive Voltage
4 - - Not Used
5 0.8 BK/WH 351 Ground
6-7 - - Not Used
8 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
9 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
10 0.35 D-GN 5060 Low Speed GMLAN Serial Data
11 0.35 D-GN 44 Instrument Panel Lamps Dimmer Switch Signal
12 0.35 OG/WH 812 IP Dimming Voltage Reference
13 0.35 PU 7062 Brake Switch Signal
14-15 - - Not Used
16 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
17 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
18 0.35 YE 6817 LED Backlight Dimming Control
19 0.5 L-BU 5986 Serial Data Communication Enable
20-21 - - Not Used
22 0.35 D-GN/WH 7158 Cruise Control Indicator Dimming Signal
23-25 - - Not Used
Connector Part Information 
  • OEM: 15482791
  • Service: 88988840
  • Description: 25-Way F HIT Series (L-BU)
Terminal Part Information 
  • Pins: 1-3, 5
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: 8-13, 16-19, 22
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 15315247/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.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
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