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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2663 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS PART 1)BODY 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 is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. 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 1851 Ground (MEX)
2 0.8 RD/WH 2140 Battery Positive Voltage (Except HP2/8S8)
0.5 RD/WH 2140 Battery positive Voltage (HP2/8S8)
3 0.5 RD/WH 3840 Battery Positive Voltage
4 - - Not Used
5 0.8 BK/WH 1851 Ground (MEX)
1 BK/WH 1851 Ground (Except MEX)
6 - - Not Used
7 0.5 GY 728 Security Indicator Control (SPO Alarm)
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 Lamp Dimmer Switch Signal
12 0.35 OG/WH 812 12-Volt 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 0.35 L-BU 5986 Serial Data Communication Enable (Except MEX)
20 - - Not Used
21 0.35 OG 192 Front Fog Lamp Switch Signal/Fog Lamps Enable (T96)
22 0.35 L-GN/WH 7158 Cruise Control Indicator Dimming Signal (Except MEX)
23-24 - - Not Used
25 0.35 PU/WH 6816 Indicator Dimming Control (Except MEX)
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: 12094429/J-35616-4A (PU)
  • Pins: 7-13, 16-19, 21, 22, 25
  • 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.