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You say yours sits perfectly level but then you post a picture showing the same front down rake that all Tahoe/Yukon/Escalades have.I can't speak to the 2018 model year with any first hand knowledge, but my 2007 sits perfectly level, which I think was the GM objective for these Denalis with the air shocks in the rear. The air shocks in the rear will inflate as needed to keep the truck level if/when you add any significant weight to the rear cargo area.
If you have a quality bi-directional scanner, you can perform the Automatic Level Control (ALC) procedure on the truck.
Remember that the front to back rake in trucks, which many folks think looks cool, is not really for looks, but rather to avoid any excessive rear height drop/droop when putting a heavy load in the cargo area, which significantly affects handling.
My 19 xl lost about 1” to 1-1/2” since i bought it new. It actually started rubbing the fender liners full lock foward or backwards. Granted my front struts were toast so i did new struts (both shock and spring) and gained it pretty much all back. My front end looked lower than yours but a little rake is normal however im not a fan of rake and want it more level but i dont want to drop the rear id rather lift the front some.Hello I am a new GMC Yukon owner. This is a 2018 Denali with the magnetic ride system. I am curious if the ride height rake front to back looks normal or do I have an issue?