Aright so here is my delema. Sometimes whenever I go to start my car..mainly after its been running, it doesnt seem to want to start.

Ill get in the car and wiggle the stick to make sure its in neutral and hold the clutch and turn the key and NOTHING...not a click, tick, or anything...my dash lights stay on for diagnostics (whatever it always does before you start the car anytime).

After about turning it for 3 or 4 times and holding the key it will finally kick in and the starter will engage. Battery voltage is fine too...could this be a sensor gone bad or anything?

 

Check the starter relay. Mine went bad and would start, next time it wouldn't and so on. Turned out to be a cheap relay....

 

awesome man thanks for your help!!! where is the location of this relay? (sorry man I just moved over from a 4.3 V6 lol)...not that QUITE farmiliar with the LS1 yet but im getting there.

 

The relay is under the hood on the right side (facing the car). You might just check the connection of the relay. My ignition relay was giving me trouble and I pulled it, put it back in, and it works fine. The relay is about $13 though.