head gaskets are a H U G E deal on this car. there known a little more to go out on the 4.6 vs the 4.0, still happens alot on the 4.0
step 1 take out engine
after you take it out, which on this thing isn't a small task, make sure you buy a timesert kit, cause if you put the head back on with those stock bolts, you just wasted your time, cause that thing will overheat / cause way more problems.
shops charge in the area of 2k to 2.5k to do this, there'* a reason they charge that much
about oh, 2 months ago there was a really good aurora forum, gmforums.com, tons of owners. that site magically disapeared overnite. I was a "member" there for about 1.5 years, so ive seen alot of what can go wrong. but trust me, it was not just the 95'* that had problems, they all did/do. only problem with the 95'* where the ones built before june (maybe it was july?) of 94, they had some issues. my 95 was febuary of 95. No idea why the aurora didn't come out as a 94 model, they had it done and magazines where testing them in 93.
don't forget that they decided to save a few bucks and use a plastic fuel rail, when that thing starts to leak, change it FAST.
not trying to scare you, its a generally reliable car, but i wouldn't pass on the warranty
btw the only decent aurora board is on edmunds.com, townhall. its all thats left