We have a 05' Armada with almost 100k on it. What can be done to tune it up? Where are the spark plugs? Ect? Any suggestions on what works best?

Depends on what you've done and not done at your service intervals...you might think about: plugs, serpentine belt, tran oil change, differential oil, cabin and air filters, brakes/rotors...usual stuff.

I recently did all of this...bought it all at O'Reilly with exception of pads/rotors...found them at Napa.

Welcome to the Club!!
NAPA has the best price on Plugs, if you choose the NGK Iridium $8 a piece in my area.

+1 on the NGKs. i used them on my turbo jetta... awesome plugs...

Welcome to CA gbaca!

thanks for the input guys!

I've kept up on the service for the most part. It's just starting to run kinda sluggish. I'm sure the radiator needs flushing too along with a good tune up.

if you need extra power and don't have a CAI I would recommend that. Also a throttle body spacer for the extra power. I recently bought an "05 with over 100k on it and really came alive with the CAI. Now good for another 100k.

the throttle body spacer is useless on the armada based on feedback from this website...