Fuel Level sensor replacement

PCULQUI

MEMBER
1999 BUICK REGAL
3.8L
V6
2WD
AUTOMATIC
124,000 MILES

Two part question:
1》 Where is my fuel level sensor?
2》 Is it easy to replace?
3》Would this be the cause of my incorrect gauge readings when the gas is low it reads out of gas but when I drive the car 1/8 mile, the lever goes up one bar.

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

The fuel level sensor is in the fuel tank and is part of the fuel pump assembly. You will have to replace the fuel pump assembly.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

The fuel tank will have to be dropped to gain access to the unit. There are some models that have an access panel in the trunk. You will need to verify it. If there is no panel, the tank must be dropped.

Roy

REMOVAL PROCEDURE

CAUTION: Fuel Vapors can collect while servicing fuel system parts in enclosed areas such as a trunk. To reduce the risk of fire and increased exposure to vapors:
se forced air ventilation such as a fan set outside of the trunk.
Plug or cap any fuel system openings in order to reduce fuel vapor formation.
Clean up any spilled fuel immediately.
Avoid sparks and any source of ignition.
Use signs to alert others in the work area that fuel system work is in process.

NOTE: Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system:
The fuel pipe connections
The hose connections
The areas surrounding the connections

IMPORTANT:
For rear compartment (trunk) accessible fuel sender assemblies, completely remove the rear compartment carpet before removing the fuel sender access panel.
Always replace the fuel sender O-ring when reinstalling the fuel sender assembly.
The modular fuel sender assembly will spring-up when the snap ring is removed.
Always maintain cleanliness when servicing fuel system components.

1. Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief Procedure.
2. Remove the trunk liner.
3. Remove the (7) nuts retaining the fuel sender access panel.
4. Remove the fuel sender access panel.
5. Disconnect the fuel tank pressure sensor electrical connector.
6. Disconnect the fuel sender electrical connector.
7. Clean the fuel pipes, and fuel sender assembly to prevent possible fuel contamination during removal.
8. Disconnect the quick-connect fittings at the fuel sender assembly.

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