How to Replace a Fuel Pump in a Chevy Impala

The Chevy Impala has an electric fuel pump so you should ensure that its fuses and relays are working before checking it. You may need to clean your fuel pump or replace it if your gas tank is not empty, but your vehicle has difficulty getting fuel. The Chevy Impala comes in a variety of styles and trim levels that can affect the replacement fuel pump you choose.

Instructions

1

Determine which fuel pump your Chevy Impala will need. This depends not only on the make and model, but also the engine size. The first generation of the Impala covers 1958 to 1961 and these models were available with 235 cubic inch (ci), 283 ci, 348 ci and 409 ci engines. Second generation models made from 1962 to 1964 may have a 230 ci, 283 ci, 327 ci or 409 engine.

2

Look at later generations of the Impala. The third generation was made from 1965 to 1970 and was offered with 250 ci, 283 ci, 307 ci, 350 ci, 396 ci, 409 ci and 427 ci engines. The fourth generation Impala covers 1971 to 1976 and was available with 350 ci, 400 ci and 454 ci engines.

3

Check the engine sizes for more recent versions of the Impala. The fifth generation was made from 1977 to 1985 and may be equipped with 229 ci, 231 ci, 250 ci, 267 ci, 305 ci, 350 ci or a 350 diesel engine. The sixth generation of the Impala covers 1994 to 1996 and has a 5.7 L engine.

4

Determine the engine size for the latest models of the Chevy Impala. The seventh generation was made from 2000 to 2005 and is available with 3.4 L and 3.8 L (supercharged and non-supercharged) engines. The latest generation debuted in 2006 and may have a 3.5 L, 3.9 L or 5.3 L engine.

5

Relieve the fuel system pressure and siphon the fuel out of the tank until it is less than one-quarter full. Disconnect the negative battery cable, remove the spare tire and jack and pull back the floor trunk liner.

6

Access the fuel pump by removing the fuel sender access panel with a socket wrench. Unplug the fuel pump's electrical connection and connector for the fuel tank pressure sensor.

7

Remove the fuel pump by disconnecting the fuel sender assembly quick connect fittings. Remove the locking ring from the fuel sender and the sender assembly will spring up. Maintain downward pressure on the assembly and release it slowly to prevent damage to the assembly.

8

Install the new fuel pump using the items included in the kit and be sure to replace the O-ring on the fuel tank and the locking ring for the fuel sender. Tighten the nuts on the fuel sender access panel to 89 inch lbs. with a torque wrench. Complete the installation by reversing the removal procedure.