Sitting at a stop light when out of nowhere, the alram for low fuel began going off and as I looked down I watched the fuel gauge go from 3/4 tank to empty. The engine gave no signs of trouble and continued to run fione. As light turned green, I took off and alarm stopped and fuel gage returned to normal reading.
Sending unit is faulty. Check for damaged wiring to the fuel pump. If wiring is good, the sending unit needs replacing.
SOURCE: 99 chevy silverado fuel gage malfunctions
A bad electric connector is possible. A bad tank sending unit can cause the same symptom. Usually the sending unit is a reostat mounted inside the tank.. it changes resistance depending on the float position, the resistance change causes a different voltage to the gauge or signal processor. The reostat may be a resistive plastic strip, as the float moves a contact pointer wipes the length of strip thus the change in resistance and voltage. Clear as mud?
SOURCE: 2002 Chevy Suburban: Fuel gauge reads empty, tank is half full
Youre gauge is controlled by a plunger in the fuel tank which is attached to the sensor and the fuel gauge. it sounds like when the plunger goes down half way its either getting stuck down lower then it should. Needs replacing. Any mechanic can do this install for you.
SOURCE: 2005 Chevrolet Trailblazer 6cyl 4wd gas gage malfunction
It sounds like you have a fuel level sensor problem. The fuel level sensor attaches to the fuel pump inside the gas tank. The tank will have to be removed for access. The fuel pump assembly comes out of the top of the tank,and the sensor can be then be replaced. Removing the fuel tank is the major expense. The sensor runs around $120.00.
SOURCE: gas gauge malfunction and engine light stays on
This is a common problem with Malibu's. It is due to cheap metal in the fuel gage that corrodes. Chevrolet knows about this but they refuse to issue a fix. The check engine light staying on and the faulty fuel gage are related. This is a defect and they need to recall this part! Raise hell with the dealership!
SOURCE: gas gauge goes up and
You most likely have a failing fuel level sending unit which is located inside the fuel tank. The sender wears a bit as the float arm moves up and down with normal fuel level variations and this wear can result in a guage that reads erratically. Many of the fuel level senders are now only sold as a part of the fuel pump module so if it turns out that it is indeed the sender you may have to replace the entire pump module. Hope this helps!
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