This sounds like the fuel level sensor in the gas tank is going bad, or there is a bad ground at the tank. A technician using a scan tool can monitor the actual fuel level data to verify.
Another possibility is a bad stepper motor in the instrument panel, each gauge had a stepper motor to drive the needle.
SOURCE: Gas gauge is moving back and forth.
hello! there, fuel gauge not accurately reading or registering your actual fuel,this can spend costly so much on refueling of gas due to worries on drying of tank.there are factor to check on fuel sensor this maybe malfunction,or check the fuel lever sensor this was located on your fuel tank,This should be done on car service center
not by yourself this is due to hard work besides fuel is flammable in small spark of igniton by a certain object.be sure to take all necessasry precaution on doing this.so its beteer qualified mechanic to this.thanks and regads..
SOURCE: I have a 2002 chevy trailblazer LS. The gauges on
check to make sure a fuse hasnt blown or a relay
SOURCE: 2001 chevy silverado 4.8 gas gauge not working properly
ceck for a loose conection on the sending unit
Testimonial: "short of dropping the tank or removing bed it seems i might be better off just replacing the whole unit pump & sending unit .i was hoping for a gauge "
SOURCE: Left rear axle seal leak 2006 Chevy Trailblazer LS ext
as long as it doesn't get on the brakes you're ok
Testimonial: "That's what I needed to know. I'll keep an eye on it. Thanks. "
SOURCE: I fueled my 2005 chevy
I had the same problem, a friend said to check gas cap to see if seals properly, bought a new one and the problem went away something to do with the vacuum seal but I do not quite understand that
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