Bought the 09 to replace my 05. My biggest complaints relate to interior space use usability. There are no storage spaces for things like sunglasses. The 05 wasn't great, but it has thee good storage spaces in the dash. For some reason GMC decided to go with tiny buttons to control climate and radio. It has taken me a while to get used to the new layout, but the buttons are just bad, especially if you have gloves on. I am looking forward to towing my 30' camper. The 05 did well, I hope the 09 does better.
Purchased our vehicle new in 2009. Generally satisfied with the SUV. In December 2012 the vehicle unexpectedly accelerated without explanation. The car was towed to dealer - who could not re-create the defect. The vehicle has a bulletin out on a throttle defect but claim that it is due to a loss of power rather than a sudden acceleration. The manufacturer declined to pay for the cost of analysis of the defect, in spite of the throttle bulletin indicating they will pay the cost of the repair. Have 75K mi. on car but now wrestling with keeping it due to the concern. Expected another 2 years out of the vehicle, especially at this price for car - but now may have to find another option.
Wife drives an '07 Suburban, and I traded my '08 MDX in on this Denali XL when we had baby #4 (too hard to use the 3rd row). Love the Denali, but have to say the '07 Suburban is faster off the line by a considerable amount, even after giving up about 90 HP. Must be the AWD and 20" wheels on the Denali. And as much as I love the exhaust note on the Denali, some folks may not appreciate that and go for the relatively quiet 5.3L engine in the Suburban or Yukon XL.
Bought our Yukon in Sept. to have another towing vehicle and for family trips. Its been great. We are enjoying the cylinder shut down feature (v8 to v4) as it gets mileage around 17 when warmed up. Comfort and ride are great (go for the autoride). Enjoying the dual row heated seats and the autostart. Would like to see more details for the money (blind spot monitoring or mirrors, pin lights for night time cabin lighting, more cubbies for storage). I too would suggest moving the compass/temp back to the center. The overall fit and finish has been very good with only one problem with a plate cover in the inside the door handle. Vehicle has met our needs for volume, handling and comfort.
The handling is great. Great improvement with the Nav-- gives great definition to detail. The heated seats work great. Backup camera gives excellent details to items behind your vehicle and is a great help to hooking up to the boat trailer. Vehicle is a whole lot more than I expected.