I've owed a 92', 01 & now an 05' Suburban. Also had a 78' & 86' K5 Blazers.
The 05' is a 3/4 Ton , LT with autoride and an 8.1L. It's been a good truck, which I purchased used with 25k miles in November 08. I'm now at 78k. Motor has been great, no 5.3/6.0L clatter at start up, I hated that! It tows the (4) place enclosed fully loaded easily, plenty of torque for a gas motor.
The gas mileage, none towing on the freeway is nothing to write home about, getting 14mpg. Fully loaded pulling 4 place is typically 8-9mpg to as low at 7.5mpg at 70+mph on the freeway bucking a wind.
No issues with brakes or wear on the 01 or 05. Both 3/4 tons. I had 184k miles on the 01' 6.0L when I sold it and I was still on the second set of pads for both front and back. Nothing yet on the 05' has needed attention at 78k concerning the brakes.
Besides normal maintanence items like oil/filter changes, I have had to replace one of the O2 sensors, airbag sensor, MAF Sensor, belt idler pulley, alternator, battery due to age recently and the dreaded transfer case half that needed to be replaced due to wear from a clip holding the pump that fails. The pump rubs a hole through the side of the case that only leaks when underway. Common on alot of 2500/3500 Chevrolets from this period (2000-2006). They redesigned the clip. WTH! Stupide design flaw that should not have been in so many model years.
Since this truck has been on the road since November 04', I don't feel these items, besides the transfer case issue, were of major concern but definitely an annoyance.
Perhaps I am more comfortable with having to replace these items as I purchased the Suburban used and at only $20k back in 08' when gas was over $4.00+ gallon. And here we are again. GRRRRRR.......
With gas prices the way they are presently, I would not want to use itas a daily driver, if I didn't have too. But for weekend towing needs with plenty of room for everyone and their luggage, you can't beat the Suburban. I love them!!