What would make the truck misfire and die?
Did you try restarting it? Sometimes the system takes one or 2 times to get pressure in the system. Why did you replace the fuel pump, was the truck giving you the same issues before the swap?
Alot of things. Vacuum leaks. Timing off. Bad map sensor or tps. Bad injectors. ignition control module. Coil. Mechanical problem. Start testing, don't just replace every part
Search Chevrolet C/K 1500 Questions
Chevrolet C/K 1500 Experts