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 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) X3 Connector End View
GM1664498Courtesy of GENERAL MOTORS CORP.
Body Control Module (BCM) X3

Pin Wire Circuit Function
1 - - Not Used
2 0.5 RD/WH 2140 Battery Positive Voltage
3 0.5 RD/WH 3840 Battery Positive Voltage
4 - - Not Used
5 1 BK/WH 1851 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 12-Volt Reference or I/P Dimming Voltage Reference
13 0.35 PU 7062 Brake Pedal Switch Normally Closed Contact 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
20 - - Not Used
21 0.35 OG 192 Front Fog Lamp Switch Signal (T96)
0.5 D-BU/YE 6841 Upfitter Provision (PPV or 5W4)
22 0.35 L-GN/WH 7158 Cruise Control Indicator Dimming Signal
23-24 - - Not Used
25 0.35 PU/WH 6816 Indicator Dimming Control
Connector Part Information
  • Harness Type: Instrument Panel
  • OEM Connector: 15482791
  • Service Connector: 88988840
  • Description: 25-Way F HIT Series (L-BU)
Terminal Part Information
  • Pins: 2, 3, 5
  • Terminated Lead: 13327199
  • Release Tool: J-38125-12A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: Pins 2, 3 - E/A
  • Core/Insulation Crimp: Pins 5 - C/A
  • Pins: 8-13, 16-19, 21, 22, 25
  • Terminated Lead: 13575870
  • Release Tool: J-38125-12A
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: SNAC3-A021T-M0.64/20
  • Core/Insulation Crimp: J/J
RENDER: 1.0x

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

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