Maintaining this vehicle is not cheap, but doing the preventive maintenance is a lot cheaper. Having a four wheel drive vehicle gives you two differentials to maintain instead of one plus the transfer case. I have run nothing but Mobil I oil in it, and perform the recommended mechanical work earlier than recommended using the best material possible. My vehicle looks new, and runs like a well tuned watch even with 157,000 miles. I have my own maintenance schedule that has kept every car I have owned in great shape for many years with hardly a breakdown (which I blame on ethanol). Change hoses every three years with a coolant flush, change the battery every three years with the best you can buy, replace any potential defective wiring as noticed, and change oil every 5-7000 miles running only synthetic regardless of climate. Replace all brakes before damaging rotors, and ensure the rotors are the best duty you can keep on the car, rotate tires with every oil change, and put the best tires on the vehicle possible. A few extra bucks here can save thousands. Update mechanicals as noted by a GOOD mechanic. I use a high quality dealership, and the repair prices are not really any higher, and the mechanics are well trained and supervised. My only real comfort negative is short seats which is common in most cars these days. I have long legs and lack of proper thigh support creates a painful butt and hamstrings on longer rides. My car has performed pretty much flawlessly.
206,000 miles later, 8 years of ownership and every time I get behind the wheel I fall in love all over again. She is an absolute sweetheart - the Envoy Denali is a great road-suv...hugs the road - runs down the road at 80 mph - 2,000 rpm - 20 miles per gallon - comfort and just plain FUN TO DRIVE.
This is my 7th GMC product and I am just now ordering a new GMC Acadia Denali - 2017 - I just hope the new one is 1/5 the suv this 2008 sweetheart is.