This is an interesting one, @padrino14.
First, I would have a dealer check to see if the lights are “aimed” or “pointed” properly. I am not sure if the new units in the Sierras need to be posted or aimed, but it would be the first place I start. If they’re not aimed correctly, then they might be shooting too low.
As for the question of the rear end of your truck being higher than others… it could be based on suspension differences. Yours has Magnetic Ride Control, if I am not mistaken, and other the 2014 Sierra Denali did not even offer that feature… so that could explain why you’re sits a bit higher.
