What are the symptoms?????????

Question

Of water in the gas?

My 2000 blazer just quits intermediately and a full tune up was done.. it runs GREAT when it is not quitting... and also a new fuel pump and filter...

Answer 1

GM has known issues with the wiring to the electric fuel pump losing voltage from the battery to the fuel pump. A professional mechanic should have checked for a voltage drop from the battery to the fuel pump wiring harness. Also the electrical plug to the fuel pumps are known to fail and give intermittent problems.  

Answer 2

does not sound like a water in the fuel problem to me. the number of possible problems is too many to list though.