Cleaning Gasoline from the Fuel System
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
- Drain the fuel tank.
- Disconnect the crankshaft position sensor.
- Fill the fuel tank to 1/4 full.
- Loosen the fuel filter drain and connect the filter to a hose that flows into a metal container.
- Using the scan tool control function, cycle the fuel pump relay to operate the fuel pump until clean fuel flows from the fuel filter drain into a metal container.
- Hand tighten the fuel filter drain and disconnect the hose.
- Install a hose on the fuel return line near the throttle body assembly, and insert the other end into a 7.6 liters (2 gallon) metal container.
- Prime the fuel system until 3.8 liters (1 gallon) of fuel has passed into the container. Fuel System Priming
- Reconnect the fuel return line.
- Reconnect the crankshaft position sensor.
- Start and run the engine. If the engine does not start, prime the fuel system. Fuel System Priming
- Stop the engine.
- Clean any fuel spillage from the engine.
- Clear the engine of any diagnostic trouble codes (DTCs).