The Blazer has 191,000 miles on it, about 2 months ago I replaced the fuel Pump with a Bosch Fuel Pump. I also replaced the 4 lead connector (for the fuel pump) & just replaced the 3 lead connector (for sending unit). I doubt the sending unit would go bad in 2 months...Where can the problem be??

It stuck on 1/2 full for a few days and of course I ran out of gas I filled it up now its stuck on full..but when I filled it - it took some time to go to the full mark........

The problem is most likely "Bosch". They make GREAT oxygen sensors and jig saws, but that's it. Get an AC Delco/Delphi fuel pump module assembly. You'll spend more money, but it's worth it to have it work properly! (if the pump is still working, it'll probably act up shortly too)

Wow...I thought Bosch made good pumps...Thanks for the heads up....