i have my 2006 grand prix with the N.A. 3800. it has just clicked over 80000 miles and just wondering what all i should do for it.

i know that spark plugs and wires last for 100000 but should i do it now or wait till 95000?

and as far as the radiator goes should i flush it? what color fluid should i put in it? and what color is dexcool?

what else should i do to it?

thanks for the info.