How many coil wires are in the engine?
I am getting an engine "surge" from the electrical system.
The way I interpret your question, you're actually asking how many spark plug wires there are. If that's the question then the answer is either 6 or 8 depending on if the truck has a V6 or V8 engine -- most commonly the answer will be 8.
The spark plug wires on a Chevy will be routed from the sides of the engines between the runners on the exhaust manifold to the distributor (or coil pack depending on the year) which is probably up against the firewall on the rear of the engine. It may be kind of difficult to see so you might need to poke around with a flashlight.
Alternatively, if you're actually asking about the wire from the coil to the distributor, it'll be a wire that looks like the plug wires but comes from the distributor (again, probably at the rear of the engine) and goes to a cylindrical part somewhere in the engine bay (the coil). Unfortunately I don't know where the coil is.
If this doesn't answer the question then perhaps some more specific information about your truck (year, engine size) would be helpful.