Gas gauge not moving up when fill up gas tank

SOURCE: gas gauge

The float that moves the gas hand is possibly stuck in the tank. If there's isn't an access hole in the rear of the vehicle you'll have to drop the tank. Unless it becomes free on it's own. Hope this is helpful. Please rate. Thanks

SOURCE: Fuel gauge not working properly Hyundai Accent

The fuel gauge utilizes a voltage stabilizer located on the back of the instrument cluster. if it's faulty it could cause this problem. The other causes are a wire fault (short) between the gauge and the tank sending unit and the sending unit itself being corroded and stuck in the full position (the float assembly that is). One way to quickly isolate (and maybe eliminate) the problem is to get a used cluster from a wrecking yard and swap it out. If it works normally, there you go... if not you will need to access the tank sending unit (this usually, but not always, involves draining and dropping the tank to get to it. Some cars have an access panel in the body over the fuel tank for this purpose... look under the carpeting in the rear of the vehicle) Once you have access disconnect the power wire (usually red or with a red stripe), and with the key on, the gauge should drop to empty. If it doesn't, the problem is not the sending unit. Hope this helps...;-)

SOURCE: 2006 GMC Envoy gas gauge not functioning properly.

GM had a problem with the fuel sending unit cards inside the fuel tank,If you replace that you should be good to go.

SOURCE: 2001 chevy silverado 4.8 gas gauge not working properly

Fairly common problem with GM vehicles. The sending unit in your tank has a small circuit board that an arm is attached to which moves up and down according to your fuel level. This circuit board and arm are not making good contact. Unfortunately the only good solution is to replace this part.

Testimonial: "thought probably that was it but better off replacing whole unit .i was for for gauge proplem thanks. "

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!