Envoy, Rainer, Trailblazer 2006-2007
Remove the fuel sender assembly.
Inspect the fuel pump inlet for dirt and debris. Replace the fuel pump if you find dirt or debris in the fuel pump inlet.
When flushing the fuel tank, handle the fuel and water mixture as a hazardous material. Handle the fuel and water mixture in accordance with all applicable local, state, and federal laws and regulations.
Flush the fuel tank with hot water.
Pour the water out of the fuel sender assembly opening. Rock the tank to be sure that removal of the water from the tank is complete.
Install the fuel sender assembly.