Stalling after Fuel Tank Installed

I had Fuel Tank replaced on 96 Blazer 4.3L. It is now stalling. It has new fuel lines, Fuel Pump is 10 months old and fuel filter is new. After tank was installed the truck now stalls. It has proper fuel pressure when running and starts fine. Going up hill is the worse for stall but will stall at stop or turn. They claim the work they did is fine but there is a problem.

Also I can hear the fuel Pump whinning when key is turned on and after turned off.

Please Help.

Thanks

I think you need install fuel pressure gauge and drive it and see if maintaining pressure
this is my best advice.thanks
michel

I took it to a shop, they tested it fuel test, diagnostic scan, and 4 hours later no solution and still have the problem.


Anyone have any advice


Please help

I took it to a shop, they tested it fuel test, diagnostic scan, and 4 hours later no solution and still have the problem.


Anyone have any advice


Please help

check all the wiring back there for loose or corroded wires. i work for
a chevy pontiac buick gmc dealer and we came across the same problem
once.the fuel pump died and we installed a new one. the customer
returned with stalling problems. we found some corroded wires that
were intermittently arcing. check all wiring very closely.