I just put 30 gallons in my truck from a quarter of a tank and when i cranked the truck the guage only went up to a little over half is this an easy fix or has this even happened to anybody on here???
Not a 6.4, but my wifes truck will do that sometimes if the truck is shut off while fueling. But within a few miles it goes up to where it should. Someone who knows more are the 6.4's will chime in and be able to help you out if the gauge is still stuck.