just a fyi for other people with random stalling. truck ran and idled fine but under load of driving when warmed up it would lack fuel, buck and stall. changed lifter pump and ops and did relay mod for new ops. still would stall. today while having my waterpump changed i had my guy drop tank and put in a new sender unit(only 70$part). it must have had a leak or the sock was to dirty becauls it runs like a top now with lots of power up any hill with cruze on and shes aces. i am so so jolly to have found the gremlin. hope this helps someone else. cheers.

 

Probably was a pinhole in it right where it bend to go into the tank. Seen it many times before.