Reference Information

2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN ASECTION Reference Information
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

Schematic Reference 

Evaporative Emissions Hose Routing Diagram

DTC Type Reference 

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Description and Operation 

Evaporative Emission Control System Description

Scan Tool Reference 

Control Module References for scan tool information

Special Tools 

  • J 41413-SPT  High Intensity White Light
  • J 41413-200  Evaporative Emissions System Tester (EEST)
  • J 41413-300  EVAP Cap and Plug Kit
  • CH-48096  EVAP Service Access Port Tool
  • J 41413-VLV  EVAP Service Port Vent Tool
RENDER: 1.0x

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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.