when looking these cars what should I look for, are their any problems/ issues?

is mileage an issue etc.

1st year of the LS1 if I remember right they run into oil issues relatively early

bad pump?

I can't remember exactly what it was but I know they are known to be not as reliable as the 99+ because they fixed whatever issue it was in 99. If I remember right it had to do more with burning oil.....damn wish I could remember Jessie.

Isn't it something with the oil pump?

its somthing with the oil passages

That's what I was thinking

also 98 has a different computer than 99 and above. I don't have any oil problems but I do have an aftermarket oil pump.

Rearends are weak.

Is this the one you are looking at?
http://providence.craigslist.org/cto/1260521070.html

yeah rearends are weak regardless what year...and we say weak but dont think if you keep it relatively stock your going to have to worry much its when u start putting significant power to it that the 10bolt shits the bed. Mine has been fine, im also at 112k but i have an 02

id stay away from the 98s...actually id look into getting a 2000+......2001 & 2002s came with the LS6 intake which, if u get a car without it, ull prob want to end up investing in anyway.

Mileage isnt a real issue though, the motors are strong and other than the rear ends which like i said isnt much of an issue unless your racing it

yes, thats it.