Chevrolet G20 fuel pump malfunction after installation, not pumping gas on Chevrolet G20

Submitted by Mr Melvin · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet G20 owners report experiencing fuel pump malfunctions after installation, including issues such as the pump not receiving power, which prevents it from pumping gas effectively. Additionally, improper priming of the fuel pump can hinder its ability to deliver gas to the carburetor. Fuel leaks are another concern that may arise from improper installation, damaged fuel lines, or faulty fuel injectors. After replacing the fuel pump, some owners notice common problems like fuel gauge malfunctions and leaks, necessitating further inspection. A sputtering noise from the engine may indicate a faulty fuel regulator, while a clicking sound could suggest a damaged pressure sensor in the gas tank. To avoid complications such as oil leaks from a silicone gasket, it is crucial for owners to ensure that the fuel pump mounting bolts are tightened to the specified torque range of 25 to 35 foot-pounds.

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Chevrolet G20 vehicles with this problem

1 model year affected
Average mileage: 199,560 miles
(199,560 - 199,560)

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