Re: '05 Xfire starting curiosity!
Could be CPS or RCM. Check the car for fault codes. CPS may give a P0335 fault. RCM won't give a fault code for no start.
Next time it won't start leave the key in the ON position and see if the radiator fans spins up REALLY fast after waiting 20+ seconds.
Also take note if the spoiler (non-SRT) gets stuck in the UP position.