2017 Tahoe LS Vibrating

[HelpSlipFrank]

Can you put it in the air and run it in gear?
Tire cupping is either bad shocks or pulsing brakes, if the suspension is good.

I do not have the ability to put it on a lift and run it. The brakes were pulsing, but replacing the vacuum pump resolved that issue. Following the replacement of the vacuum pump, we put on new tires, so that's no longer the issue. The suspension appears to be in good shape, no visible defects, no lose parts, etc. I'm bringing it to a different Chevy dealer in a few weeks for a second opinion. Yea, I can't get into any dealership for weeks around here (RI).

 

[gat0r]

from buffeting/vibration threads...

ask dealer about - PIT 5429 & PI1354(something about balance & runout of driveshaft)

dealer has a list of things to try... unfortunately these items dont always resolve it.

-get rid of crap GM bridgestone tires (have dealer get you something of quality)
-road force balance your new tires
(rim size doesnt seem to matter)
-update roof reinforcements
-change out front &/or rear driveshaft
-replace entire rear end/differential
-disable AFM w/ either range device or a tune
-change body mounts (this is new update on 17's, *** still doesnt seem to fix issue)


for now it seems most vehicles either have the issue or not. most have. there is no rhyme or reason.
i have a '15 ltz burb 4x4 (w/ 6ok)... no issues so far. <knock on wood>

also look for leaking shocks(MRC or autoride)

i also recall an issue something about defective welds on upper control arms that could effect handling & was a recall

 

[hjrecla]

TLDR; truck is vibrating, dealership is telling me it's "within spec and normal." However, vehicles do not normally vibrate like this. Any help?

First time Chevy owner here. In July I purchased a GM Certified 2017 Tahoe with 44k miles. It started off on the wrong foot with me driving home in the car I traded in. They agreed to put new brakes (rotors and pads) on the vehicle, and ended up replacing a vacuum pump as well. The vehicle had a slight shake/vibration to it at that time, so they also road force balanced the tires. About a week later the truck is brought to my house.

A few days later I take it on the highway and it's still vibrating, starting around 45MPH and intensifying until 70MPH, from there it remains about the same intensity. So, I tell the sales guy and bring it back in. This time the service manager notices some scalloping on the tires, says that could be cause of the vibration, but the tires are otherwise good and the problem will likely go away with a few tire rotations. Well, that's not sufficient for me. After about an hour of arguing and test drives with different people, they agree to replace the tires.

On the drive home things felt slightly better. I'm new driving a big vehicle and thought maybe there's some vibration as the tires break in, or something. Well, the vibration continued. On a recent 400 mile trip the vibration was worse and could feel cabin pressure changing, like you could hear the vibration, not sure what the word for that is. The check engine light also came on, throwing a P219A code for a fuel injector.

On Tuesday, I brought it back to the dealership for a third repair attempt. They replaced the brake pads because they were throwing a high-pitch sound with light braking. They're replacing the fuel injector as well. As for the vibration, they repeated their original stance, the vibration is "within spec and normal." I demanded they show me the spec for allowed vibration, turns out that doesn't exist. Also, I have feeling that vibration is no where near "normal" as I've never had a vehicle vibrate without reason.

Anyone else have these kinds of issues with their Tahoe (or analogous vehicle)? Thank you!