Common complaints owners have about the 2007 GMC Yukon Denali are high oil consumption, poor gas mileage, and the tendency for the dashboard to crack and the instrument panel gauges to stop working, according to RepairPal.com and reviews on CarGurus.com. The issues are also present in the Denali XL.
In regards to the vehicle's tendency to consume too much oil, one reviewer on Edmunds.com states that the Denali XL burns 2 quarts of oil per 2,000 miles, even though General Motors states that the vehicle should not consume more than 1 quart per 2,000 miles. Reviewers on CarGurus.com state that the 2007 GMC Yukon Denali gets only 13 to 14 miles per gallon in the city and 16 to 18 on the highway.
The dashboard is most likely to crack in warm climates, especially when the vehicle is parked in an area where the dashboard is exposed to direct sunlight quite often. The most common repair solution is to replace the trim on the upper instrument panel.
Several models of the 2007 GMC Yukon Denali were manufactured with faulty wiring in the instrument panels. The result is certain gauges, typically the speedometer, behaving inconsistently. The solution is to send the entire instrument panel to a specialized repair center, and General Motors has extended the warranty on vehicles with this issue to either seven years or 70,000 miles.