SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2678 (COMPONENT CONNECTOR END VIEW (1 OF 5))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 does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 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 Color Circuit Function
1 0.8 BK/WH 1851 Ground
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 +
0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus + (HP2)
9 0.5 TN 2501 High Speed GMLAN Serial Data Bus -
0.5 TN 2501 High Speed GMLAN Serial Data Bus - (HP2)
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 Not Used (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 
  • OEM: 15482791
  • Service: 88988840
  • Description: 25-Way F HIT Series (L-BU)
Terminal Part Information 
  • Pins: 1-5
  • Terminal/Tray: SNAC-A061T-M2.8/20
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: 6-25
  • 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

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.