Quote:
Originally Posted by grayharville
My bro in law has an 08 sierra denali with a 6.2
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No he doesn't. They do not "require" 92 octane.
My wife has had several Denali XL's had I have owned several 5.3 powered CC GM trucks so I feel I can offer some real world advice. The Denali XL beats any 5.3 powered hands down except mileage. It is the most well balanced GM vehicle I have ever owned and I have owned a LOT of them.
It rides like a dream, loaded or unloaded due to the load level system. Pulls a car trailer just fine, and stops it even better. It truly makes you feel like your in a much smaller vehicle when you roll hard on the throttle. Besides all that, it has one of the sweetest sounding stock exhausts I have ever heard.
When I drive it with a light foot it will gets 17mpg average. When my lead footed wife drives it that drops to 12.
