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HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 11 (ENGINE CONTROLS - 6.5L (L65) (INTRODUCTION))REPAIR INSTRUCTIONSFUEL SYSTEM CLEANINGGASOLINE IN FUEL SYSTEM
2001 Chevrolet Suburban C1500

Gasoline in Fuel System

2001 Chevrolet Suburban C1500SECTION Gasoline in Fuel System
WARNING: This page is about a different car, the 2001 GMC C3500 HD and 2001 Chevrolet C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Engine Will Run or Start

  1. Drain the fuel tank. Refer to Fuel Tank Draining Procedure .
  2. Fill the fuel tank to 1/4 with diesel fuel.
  3. Run the engine for 15 minutes.

Engine Will Not Run

  1. Drain the fuel tank. Refer to Fuel Tank Draining Procedure .
  2. Fill the fuel tank to 1/4 with diesel fuel.
  3. Remove the ECM 1 fuse from the underhood relay center.
  4. Install a hose from the fuel injection pump inlet hose (hose to hose) at the fuel injection pump to a closed metal container with a capacity of at least 8 liters (2 gallons).
  5. Crank the engine for 15 seconds with one minute cooling periods to purge the gasoline from the system.
  6. Reinstall the inlet hose to the injection pump.
  7. Install the ECM 1 fuse in the underhood relay center.
  8. Start the engine.
    IMPORTANT: Check for leaks.
  9. Run the engine for 15 minutes.
  10. Clear the engine DTCs.
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.