Inspection/Maintenance Evaporative Emission System Set Procedure: Description

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Description
WARNING: This page is about a different variant/trim than selected.

Purpose of this test is to satisfy enable criteria necessary to execute I/M readiness diagnostics for Evaporative Emission (EVAP) system. Test may be used to set I/M SYSTEM STATUS indicators to YES. Service Bay Tests are included on scan tool for some systems depending upon vehicle make and model. Test is designed to allow EVAP diagnostic tests to run in service bay conditions. Ensure vehicle meets requirements listed in enable criteria before performing either EVAP system test. Failure to meet necessary requirements may produce inaccurate test results.

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When to See a Mechanic

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

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.