I've owned a few and put heaps through my little car brokerage business...
As above, points to look out for...
Pre-ecotec (VR) Death Rattle (timing chain/cam sprocket journals flogged)
VR/VS Harmonic balancer (they're all f@$ked, try to find one that has been replaced already cos they ain't cheap)
Odometer not working (they're all f@$ked)
a/c fan control resistor (they're also all f@$ked, and your fan won't work on 1 and 2)
HEAD GASKETS!!!! ALL GM V6's like to spit gaskets. ( I have done at least 4 in the last year) Check for milkshake under the oil cap
Radiator header tanks.... they're plastic, and rubbish. Brand new china spec replacement rad is $150 on evilbay.
Power steering leaks
Rack rattle
Transmission slip
Window seals shrink and leak
AC compressors are standard delco trash with the centre seal which perishes and leaks gas... don't believe anyone who says "It just needs regassing" It doesn't. The compressor is rooted and a new one is $$$.
Don't buy one that has been lowered. Every other suspension component will be flogged out as a consequence, and your rear bump stops will be missing.
Bailey channels work their way up and out of the runners, prick of a job to get them back in again.
Doors can sag... Adjust hinges with cold chisel and large floggerometer.
Oh and don't put a big exhaust on it... no matter what you do, it will still sound f@$king horrible.
VS II is the pick of the bunch, although the airbag cover on the passenger side dash will be lifting and need to be sikaflexed back down.
Do not, under any circumstance, buy a VT. Just don't.
Good luck. :dance: