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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 941 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L (LMM) - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSHIGH IDLE SWITCH PROGRAMMINGHIGH IDLE SWITCH PROGRAMMING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

High Idle Switch Programming

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION High Idle Switch Programming
WARNING: This page is about a different car, the 2007 GMC Savana Special, 2007 GMC Savana Camper Special, 2007 GMC Savana, and 2007 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  • Using the Tech 2, select Module Setup/PTO Options
  • Use soft keys to select desired settings.
  • When setting selections are complete, select Reprogram.
    • IMPORTANT: The ECM will not operate under the new value until the it has powered down once.
  • Turn OFF the ignition until communication with the ECM is lost, as indicated on the scan tool.
  • Start the vehicle and confirm the new settings by operating the high idle switch.
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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.