1998 P30 Chevy 454 - Stalling at interstate speeds

Sometimes these things can be hard to diagnose. In the beginning stages of failure it does strange things. If you read through the next post "Engine stumble's at idle" you can see the details. In short my fuel pump had the right fuel pressure ran fine at high speeds and pulling hills but was hard to start and keep running at low speeds. Good luck hope the shop finds and fixes it for you.