[litebulblsc]

Play it safe.

Check oil
- is there oil in it?
- is it overful, suggesting something is getting in there?
- does it have strong gas smell?

Pull all 8 spark plugs/ assuming it's a v8
- any of them damaged?
- any moisture on them?
- heavy carbon?

Try barring the engine over.
- using a breaker bar or ratchet and I think a 5/8 socket turn the engine over clockwise from the crank bolt.
- be careful if it does not want to spin as Chevy uses a smaller crank bolt then other manufacturers.
- if it spins a full 2 revolutions, it should be good.

Starter engagement/ disengagement issues.
- Chevy starters can require shimming.
- look up shimming Chevy starter on google and buy starter shims at auto parts store
- usually have to pull the bendix/ starter gear out manually and measure clearance between it and the flexplate.
- a paper clip of the right thickness or something similar is best to use
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