Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 51 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING - 6.6L)FUEL SYSTEMSFUEL SYSTEM CLEANINGCLEANING GASOLINE FROM FUEL SYSTEM
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Cleaning Gasoline From Fuel System
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Cleaning Gasoline From Fuel System
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Drain fuel tank.
- Fill fuel tank to 1/4 full.
- Remove ignition 1 relay from the underhood fuse/relay center.
- Loosen fuel filter drain and connect filter to a hose that flows into a metal container.
- Operate fuel system hand primer at fuel filter until clean fuel flows from fuel filter drain into metal container.
- Hand tighten fuel filter drain and disconnect the hose.
- Install a hose on the fuel return line near the glow plug relay and insert other end into a 2 gallon metal container.
- Crank engine for 30 second time intervals with one minute cool down periods. Continue until one gallon of fuel has passed into the container.
- Reconnect fuel return line.
- Install ignition 1 relay into the underhood fuse/relay center.
- Attempt to start and operate engine for 15 minutes (if engine does not start, operate the hand primer for 30 strokes or until firm).
- Turn engine off.
- Clean any fuel spillage from engine.
- Clear any DTCs.
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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.