I purchased my 99 'burb in 2002 with 36000 miles. it now has over 180000 miles. It has been reliable vehicle overall. I always kept up the maintenance, but as it got older more has to
be repaired. which is typical of any vehicle I believe. I've had it everywhere on vacations to hunting trips, I've pulled campers and various trailers with no problem at all.
I did have to replace the fuel pump four times. But I put some of that on my "mechanic".
Now it leaks oil, not profusely, but it does, and I need to repair the cooling system. Not too bad for 180000 miles though.
I loved it, took care of it, said I'd keep it until it dies. Sadly, she just about has.