Fuel sending unit

[bowdown916]

If the fuel guage its not showing the current fuel in the tank or it slowly will show the current fuel, its that means the sending unit its going bad?
I fill up my tank like 3 days ago, and it never show it was full,but the needle when up like half way very slowly for like 2 days lol..

[slammed79]

It could be the sender going bad or the gauge itself in the truck.

[bowdown916]

Hopefully its not the guage cuz I just replace it for another one..

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[GUITAR1989]

What was your old gauge doing that made you replace it? Did the new gauge work after you installed it? Maybe a wire came lose or something like that. I would mess with the wires first and make sure nothing came lose. Since its a new gauge id suspect the sending unit or wiring as the problem..but you never know I put some autometer gauges in a while back and ended up dropped my gas tank cause the gauge wasnt reading correctly. It was my sending unit.

Heres a link to a gas tank drop and sending unit replacment just incase you end up needing to do it.. http://forum.73-87chevytrucks.com/smforum/index.php?topic=9294.0

I think theres also a poste on here somewhere about trouble shooting gauge/sending unit problems and the symptons they show.