Chevy Truck Dies While Driving

You didn’t tell me whether the check engine light came on when the problem occurred. If the check engine light comes on it might be somewhere in the gasoline system. Have you checked the fuel in the tank itself? It is possible the fuel is old and needs to be replaced. Or, it is possible that there is dirt and grit in the tank that is occasionally blocking up the flow of gas. For this problem the fuel tank has to be dropped and it needs to be flushed. The filter in the tank can sometimes also become temporarily blocked and require cleaning. This is one possibility.

Another possibility — and the one I think that is the most likely — is a failure in the truck’s fuel control module. I think that you will find that if you do a diagnostic check with a OBD-II code reader that the codes will be pointing towards this electronic error. The symptoms of this include exactly what you are talking about. You drive the trucks a certain number of miles, it heats up and it fails.

What I suspect is likely happening is that the circuit board for the fuel module is being heated and it becomes warped. As it becomes warped — it resumes more or less normal shape — when it cools — the board loses contact with either the finger stalk with which it talks with the rest of the engine. Or, it some of the devices that are solder to the board become lose and lose contact with the board. The result is that the truck stalls out, with no visible failure indication. Yes, it is recorded in memory, however, unless you have the diagnostic reader, there is no way of knowing that an error has occurred.

Trust me when I tell you, though that you will have to look at the electronic side of things for this problem. You have already explored and replaced the parts that can be replaced. And, since the problem keeps on occurring, it is likely a sensor or circuit board.