The 3800 has a timing chain, not a belt, so that's one less thing you'll have to worry about.
The 3800's are a pretty solid engine when it comes to reliablity. Some are seeing upwards of 200k on the odometer.
02's are a good year so I don't think you should have to much to worry about.
I'm sure others will enlighten you even more.
_________________________
Bobby
Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.