Scurvey

Specifications of the vehicle? Yukon SLE/SLT or Denali? 20 inch rims or 22inch? Moonroof, no moonroof? Fixed running boards or retractable? Thanks!

To paraphrase the "marketingeneers": "All models – 2WD and 4WD – feature an updated coil-over-shock independent front suspension design, with forged aluminum upper control arms and cast-aluminum lower control arms. They are 12 pounds lighter per side and 10 percent stiffer than comparable steel components." If you want to know what forged aluminum components in the suspension will deliver in terms of ride quality go drive an Infiniti G35, Porsche, or most European vehicles. They are stiff and transmit vibrations like HELL. People that used to ride in my 2007 G35 would ask, "Dude? What the heck is wrong with your car??". My reply, "Absolutely nothing. Welcome to all-aluminum suspension components". Aluminum is going to transmit up vibrations of running over a nat's ass into the frame, I don't care what kind of "magnetic ride wizardry" you try to put between the attachment and the strut mount, you are going to get a ride that is more than 10% stiffer in your perception vs the previous generation. Based on the red 2015 Suburban that I saw rolled over on the freeway that people walked away from...hey, I like stiffness! Agreed that a solution(s) may (potentially/eventually) be forthcoming for those that are disappointed in the ride. With production numbers as they are there can't be that many making noise.

Is the pressure different than the shaking and vibration, or does it all occur together? One individual said that you could actually see the headliner shaking? Is this the same issue you are experiencing on your test drives?

My point: Natural ride characteristics of the vehicle characterized by some as "normal" will be characterized by others as "unacceptable vibration". Moving along!

Ah, one of those forums. Good luck! It was just additive information.

Nothing abnormal. I am running 22 inch with painted inserts (Q7M code). 700 miles was in a SLT with 20 inch aluminum wheels. Ride is probably a touch firmer with the 22 inch setup but its hard to tell the difference. Put another 50 miles on the vehicle today driving freeway / back roads / stop-and-go traffic. My litmus test for shaking and vibration is too look over at the passenger headrest and see the amount of vibration. Seat attachment to a frame is essentially a lever with a mechanical advantage. Today I could hardly notice any vibration in the headrest. If you take a ride in my 2013 F150 Off-road 4X4 you will see the headrest vibrating at most speeds. I want to reiterate is that if you are expecting to just "float and glide" across the road like some sort of maglev train that is not what this truck does. It has excellent smooth ride quality but still lets you experience some of the surface conditions. I am fine with that. If you have ever driven a Lexus LS400 you know what I am talking about.....ride so refined and disconnected that it drives you to tears with boredom. I don't want that please. There have been a 1 or 2 oddball shifts on the transmission but I don't really think about transmissions until the break-in program has completed. I don't plan on doing anything with the 4x4 transfer case until well after 500 miles. Regarding quality control, just a couple of minor issues (I can always find something wrong with any vehicle). Interior guy forgot to clip in the drivers side front leather attachments. I simply grabbed them and clipped them in as designed. The only way you would see this is to look under the seat. Sunroof weather proofing strip was sort of hung up for about 1/2 inch. Simply straightened it out with a credit card. Absolutely love this truck so far and so does my wife.

Been driving the 2015i Denali XL around in the recommend ranges and don't have any pressure or booming issues yet. Truck currently has 400 miles on it. For what the vehicle is (full size family hauler) the ride is absolutely amazing, however it is a completely different type of ride from the last generation of what I call "floaters" (2007-2014, very loose/floaty/drifting rides). If you have ever spent a fair amount of time in a BMW or an Audi you will be familiar with the type of ride I am talking about. Its more "German" than "American" in terms of how the road surface communicates back to the driver. The truck is a 4x4 and has the 7500 GVWR package so that probably does stiffen up the ride a bit. If you are coming from the previous generations of vehicles expect a dramatically improved but completely different driving experience. You need to test drive this car extensively on various road surfaces and speeds to understand its handling.

Feel like an idiot for not doing more research into the ANR prior to my purchase. During summer trip we rented a semi-loaded GMC Yukon XL SLT in South Dakota and put 700 miles on it. I didn't like the 5.3I with 3.08 rear. Just closed on a 2015i Yukon Denali XL 4X4 two days ago, May 20th build per the GM representative. If I had read these threads I would have NEVER bought this vehicle. Broke my own rule: "Thou shalt NEVER buy 1-2 years into new gen vehicles". I can only pray this is not going to be the most expensive mistake I ever made. My 2011 Sub LT 4X4 was bullet proof.