Truck shuts down when making a turn

[joesherrie12]

The truck shuts down when I make a turn or on a hill taking off.But starts back up after I stop and cut key off and back on again.its like just cutting the key switch off. Sometimes when I first start the truck the uplift pump won’t come on but I can cut the key on/ off a couple of times and the pump will start working and it will start. ( new pump installed back in August) 09 Pete 387 isx