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We own a 2003 Avalanche 5.3 (same frame/drivetrain as the older Suburbans) and a 2007 Denali. Talk about American cars going forever.... Just some electrical hiccups on the Avalanche after 9 years of batteries and tires.
The Avalanche still runs the original brake pads. Avg MPG on the Avalanche is 16. 5.3 sounds funny upon startup (piston slap) but has never failed nor smoke.
The Denali is a 6.2 awd and it is a leap in fit/finish over the Avalanche. Now it kills tires and burns gas like mad (MPG about 11). Finicky on the alignment department. We bought first year and it was delivered to us in January so perhaps we got one of the trucks built during the learning curve.
Engine is robust and has a nasty roar! The leather is much more supple than on the Avalanche but it shows. Whereas there is no tear or crack on the Avalanche, the Denali shows wear.
Where GM made a massive mistake is on the 3rd row seats which do not fold down flat and take quite a bit of storage space. When they are open (ours is the "short version") you have about 12 inches of space behind them only.
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International GT Champion; Porsche GT3 Cup Trophy Champion; Klub Sport Challenge Champion; Rolex Vintage Endurance Series Champion; PCA Club Racing Champion; National Vintage Racing Champion
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