1999 Chevy suburban lt 1500 5.7l died while driving and won't start

If very far from home, call a tow truck, Have it towed to a mechanic or towed home, so you can work on it. I don't like being stalled on the side of a busy highway, and trying to work on vehicle. I always feel better getting the vehicle home, even if I have to call a tow truck, then work on it at my leisure. The basics if it cranks good but won't start, spark--proper fuel pressure--fuel injector pulse--trouble codes? good luck

Haven't given anyone much to go on here. You have to start with some good old fashioned troubleshooting. Is the engine turning over (cranking)? If Yes, the battery and starter are good. Does it have spark? Pull a plug wire and test. If not, you have an ignition system problem. Does it have fuel? Starting fluid is the easiest way to check (remove air filter and spray a bit in to see if it starts). Does it have timing or compression?