Today, I went out to start my 2000 Blazer and it wouldn't start. I waited about 3 hrs or so, and went back to start it, It started fine. Then about 15mins ago i went to start it and nothing again. No clicking as in a dead battery, no attempting to start as if the passivlock is acting up just nothing. Anyone have any ideas, thanks in advance.

Do you have power when you turn the key when its not starting. Do dash lights come on?

No, there is nothing at all. no lights no dings, no dash lights no nothing.

Check the cable connections on the battery first.
Check the starter connections next.

Also check the connectors for proper fit/mating at the EEM unit on the pass. fender, and on the firewall by the wiper motor.

okay will check, someone suggested that it may be a solenoid? are they referring to the starter?

okay will check, someone suggested that it may be a solenoid? are they referring to the starter?

Yes, it's on the starter.
But that wouldn't cause a no dash lights problem.
Your problem sounds more like a bad battery connection somewhere.