"I purchased my Sierra Denali new, in the past during service I have been given Cadillacs as loaners and couldnt wait to get my Sierra Denali back, Great Power, Great ride, outstanding in every way.
I have 5 other vehicles Including a SL55 AMG and a 650 convertable and when I have a choice of which set of keys to grab it seems that it is always my 2008 Sierra Denali
(as you can see by the miles I have put on it in the short time I have owned it) I would buy another one, as a result of driving in my truck my business partner has purchased a 2011 GMC Sierra and feels the same way about his truck."
"I brought this truck brand new in 05 it has 29,000 on it looks great! Only thing I wish Gm would do if you buy something brand new you should be able to tell them to take the Bridgestone tires off and but Michelin tires on. As for the fuel mileage it should be better. I have 6.6 duramax,allison trans,5in dual exhausr with flow master exhaust.I wish it could ride just a little better also. But I look good coming down the road with it. It has pulled 30ft. camper with no problem and stopping with ease.I wish it had a bigger fuel tank."
"Although it's probably the nicest truck made by GM it has it's quirks. The made in China aluminum wheels still flake the clear coating after 1 winter, The chrome bumpers rust after 1 winter, it also can be bent, twisted, flexed and krinkled by hand.. The body panels are soft and easily dented and the paint will show rail dust rust particles after i winter. The 36month/36000 mile warranty is still pretty much worthless as GM won't replace the wheels or bumper even after the service advisor said that they would."
"Best truck I’ve ever owned – 110,000 and still going strong! Pulls anything w/ plenty of power to spare. MPG towing 15, highway19+. Maintenance is a breeze (very well thought out). Driven cross-country several times with the whole family and would do it again in a heartbeat (no pun intended). The only issues I’ve had is that the rear brakes wear quicker than the front and the fan switch/knob had to be replaced twice."
"Fuel mileage poor for a diesel, Does have great power. Inteior creeks or rattles, less than a year old and had two oil leaks! Body panels dent very easy, dented fender from just leaning aginst it. Need more storage compartments around dash & console. Not a good work truck, not tough enough."