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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1926 (COMPONENT LOCATIONS - ELECTRICAL CENTER IDENTIFICATION VIEWS)ELECTRICAL CENTER IDENTIFICATION VIEWSJUNCTION BLOCK - LEFT I/P X4 (EXCEPT MEX)
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Junction Block - Left I/P X4 (except MEX)

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Junction Block - Left I/P X4 (except MEX)
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Junction Block - Left I/P X4 (except MEX)
GM1665714Courtesy of GENERAL MOTORS CORP.
Junction Block - Left I/P X4 (except MEX)

Pin Wire Circuit Function
1 0.35 D-GN 5060 Low Speed GMLAN Serial Data (except Y91)
0.35 D-GN 5060 Low Speed GMLAN Serial Data (except Y91)
2 0.5 RD/WH 340 Battery Positive Voltage (UK6 without Y91)
0.5 RD/WH 340 Battery Positive Voltage (U2K without Y91)
3 0.8 D-GN/WH 817 Vehicle Speed Signal (UUL or UUK)
4 3 BK 2550 Ground (UQA without Y91)
5 0.5 BK 2550 Ground (UE1 without Y91)
05 BK 2550 Ground (U2K without Y91)
6 0.5 RD/WH 3240 Battery Positive Voltage (UE1 except Y91)
7 0.5 BK 2550 Ground (U42 without Y91)
8 0.8 RD/WH 1040 Battery Positive Voltage (UQA without Y91)
Connector Part Information 
  • Harness: I/P Extension
  • OEM: 13516829
  • Service: 19115667
  • Description: 8-Way F GT 280 Series (OG)
Terminal Part Information 
  • Pins: 4
  • Terminal/Tray: 13525969/4
  • Core/Insulation Crimp: F/D
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: 1, 2, 3, 5, 6, 7, 8
  • Terminal/Tray: 13525970/4
  • Core/Insulation Crimp: Pins 1, 2, 5, 6, 7 - E/A
  • Core/Insulation Crimp: Pins 3, 8 - 2/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
RENDER: 1.0x

NO RELATED

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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.