gas gauge only reads half full, but i know the tank is full, what's wrong? and how can i fix it??

2004 Chevy TrailBlazer, when i fill the tank up the gas gauge only reads half full, whats wrong with it and how can i fix it?

Gemma2007-04-12T09:18:31Z

Favorite Answer

Probably need a new fuel sending unit.

johnnybegood2007-04-12T16:22:02Z

Sending unit sounds about rite

(A)2007-04-12T09:21:13Z

Could be a bad ground and/or to much resistance in the circuit.

ayhankaygisiz2007-04-12T09:21:52Z

clean the fuel injecter buy a cleaning fuel