I have a 2001 GMC Yukon Denali. I am the second owner having bought it at 35k miles. Now at 180k miles, the only items I have replaced are the water pump at 125k, rear evaporator at 170k and fuel pump at 178k & a few interior switches: brakes, tires and shocks as needed. Otherwise, just regular maintenance of all fluids. I use synthetic fluids exclusively; oil every 7-8k miles, trans fluid change every 50k, differentials, ps, brake fluid at 100k., brakes, shocks and other wear items. I average 14 MPG city/suburban driving and 16-17 MPG highway. Long term ownership costs even including gas have made this an economical vehicle.
I love the interior with its attention to detail. The exterior just commands attention and it has plenty of power. I pull a 6200 lb. camper with ease. In 136,437 miles I’ve had two problems. One with the drive line ($500) and the other with the air conditioner ($900). And the Bose system is one of the best factory sound systems that I have ever heard.
Overall, a pretty good SUV... The 5.3 V8 gives you the horsepower you want. Gas mileage is the only downside, I average 14 with heavy city driving. I previously owned a 2004 Avalanche with the 5.3 V8 and I averaged 16.7, and I wish that my Yukon averaged that, because I was happy with 17. I recently replaced my O2 sensors (rear), as they were going bad, and improved my gas mileage by 2 MPG. I think I am going to get a K&N high-flow air filter. I had it on my truck, and I improved my gas mileage by about 1.5-2 MPG. I also noticed a little bit of a performance increase. Summary: Great car, just wish it got better gas mileage.
Vehicle was great when it was new, but as soon as the warranty expired, many things started to fail. If you decide to make a mistake and buy a GM SUV like I did, make sure you get the extended warranty. This is the last GM vehicle I will ever purchase.
Bought GMC ext warranty because of the high mileage driven. We had a piece of side molding replaced, and the car had a terrible knocking sound when there were high winds. Took dealer several times to find the problem. The water pump failed ($100) at 67K. The auto-down switch failed ($100). Engine de-carb, and fuel inject cleaning at 65K ($300+) for an intermittent hesitation problem. Hinge on the rear window lift- glass failed. Extended warranty would not cover hinges - $793 to repair. Toyota dealer offered us 16K and Carmax offered 14.8K. Wound up taking the dealers offer. We won’t be buying GM products again.