2002 Chevrolet Blazer truck wont start

There is no telling what might have been damaged? If it cranks good, have a helper crank it, while you check for spark at the spark plugs. If you have spark everywhere, check fuel pressure.

Can you check for applicable trouble codes? To check codes yourself, at the least, you need an obd2 code reader. Check for ref voltage at one of the engine sensors, key on. That should tell you if computer is awake.