tonygxp

I just traded in my three-year-old 2016 all terrain with the 8-speed and 5.3 double cab. Week before I trade it in I had the tires rebalanced Goodyear Wrangler SRA of course and two of the four tires had issues where they were just going up and down on the wheel balancing machine the technician was amazing as I was not putting new tires on the truck I'm about to trade he bounce them out to zero after about 2 hours and I took the truck for a ride. Rides perfect never rode like this before. Going back a few months ago I finally had the torque converter replaced and trans flush with the new low viscosity fluid that they claim is the issue with the 4 cylinder 8 cylinder operation and that took care of a certain vibration at around 77 miles per hour but it still didn't ride right and lo and behold it was the tires. But like many have said there's so many moving Parts on this truck and for some reason they tune this chassis to be so tight with intolerance of vibration that any little thing any little variance can trigger a terrible oscillation at the higher speeds I bet you if you took a 300 pound weight and put it in the bed of the truck and move it all over a place and took it down the highway you can counteract the vibration but a why should we have to do that and be who the hell is moving 300 lb to figure it out! I love that truck but as soon as I got on the highway and took a trip somewhere I remembered why I hated it PS it's not just Goodyear Wrangler issues. it's the truck.. my buddy has a 16 Sierra Denali with the 22s on it in Ultimate package none-the-less and it does the same thing (vibration) at around 72 to 77 miles an hour.

haven't been able to post been busy. my truck went back for a second shot at the oscillation issue at 70+mph cruise.. they replaced the bad tire i pointed out to them with the hump in the tread causing out of roundness (that they missed the first time saying rotating it 180 out on the wheel it balanced.. no way it did.. i had it rebalanced privately and it was pointed out to me So.... old tire 30+ on the RF balanced new one says 8.. that said it is a little better but still there.. the service writer bill, great guy, owns a 15 CC Sierra short bed with 18's.. says he got his same week i got mine, his does it too.. and he got one with 18's seeing how many 20 trucks had the issue lol.. He said roadforce replaced two tires helped but it's still there GM doesn't know what to do other than throw parts at it.. minimizing the issue but it never truly gets repaired it's an engineering / design issue.. well there's your answer folks and i believe him 100%... most people don't have to deal with it enough that they'll buy out there 2% of unsatisfied owners and hope to hit it on the redesign.. On a side note, they said they are going to repair my damaged wheel (face) in the spring when it warms up a bit. I put the spring clamps on today and man did it smooth out the ride these rancho's have... if anyone reading this has rancho's on their sierra's these clamps are a must... so happy the oscillation didn't bother me as much lol.. hit bumps with nothing in the bed and it feels so good, like a car over sharp impacts... before it was "nervous" too springed up i guess is a way to describe it? but spend the $15 and it took my 5 minutes to install over the rear tires with my dewalt impact. 1.2.3 done. about 5 inches in front of the rear (closer to cab >>>>).

my onstar antenna was leaking from new (in Aug 2005, i was the 2nd person in NJ to take delivery of the new V8 Grand Prix GXP) and it was filling the map lights lol... not funny then for sure... That car also had a pinched yaw sensor wire, caught under a screw to the center console on assembly... great job "eh" (built in a canadian plant which won quality build awards lol...i can't win!) stranded with 90 miles on it.. no power at all..was shorting out... and then again at 250 miles PS. my first all terrain (a new 2008 Extended cab) was allowing water to come in through a loosely fitted passenger front door.. used to soak the floor... I don't know why... i keep buying these GM's? I lemon law'd a 2003 Envoy XUV for AC that would go hot for no reason after the first start of the day (once it was shut down, upon restart AC would take several minutes of hot air blowing before compressor would come on.. replaced EVERYTHING to no avail!) now i have a Sierra that oscillates or vibrates, take your pic, on the hwy

so far mine has been good. 10/15 build date purchased saturday after thanksgiving.. i have had the pandora bleed through during a phone call to a doctor, that was interesting i thought it was on his end lol.. then i realized it was billy joel which i was listening to before!

yep..... like has been stated hundreds of times in this thread and elsewhere they all exhibit this just let someone who has it take it for a ride they'll point it out and after that your world will never be the same lol Thanks for the update. I emailed my dealer about all the issues i found when attempting to rectify it myself with the help of a friend who has the same truck at his 7,000sqft performance shop which is equipped better than most dealers around here including an awd mustang dyno and machine shop including a $250,000 five axis CNC machine just to nae a couple of things dealers do not have (at least around here)... If i don't receive a satisfactory response from them I will bring it back to the selling dealer (idk what they will do about the wheel the repairing dealer damaged?) and from there I will install those blocks, see if it doesn't quell the shimmy/oscillation/vibration (or whatever other acronym for RIDICULOUS RIDE QUALITY you like lol).. from there I will continue with a call to GMC customer service and from there??? 1-800-my-lemon which i hope doesn't come to that.. I have to hand it to some of you guys who bought these trucks.. god bless you..I would be on fire if i owned this thing... even if i leased it without the extra $3k lease cash i found on this one (increasing the payment another $100/mo)... it's the only thing keeping me from parking it back at my selling dealer and handing them the keys....it's hard to get mad about something I only deal with on the hwy, it's my wife's truck I have a jeep and corvette. but we take this truck on trips, we like to travel in a full size truck.. if i only knew ahead of time i would have leased a ram, rides like a Cadillac on the hwy (i've had them for work vehicles recently and the F150 rides great too but much more truck like, sans the shimmy!). I plan (or planned) to take this truck on a road trip during spring break when my wife is not working to either florida or possibly the corvette museum, maybe football HOF but idk if i want to lose my mind on the ride there watching a water bottle in the cup holder! as i try to convince myself it's not there, it's back what about this speed?? i purchased this truck to replace her 13 equinox LTZ which outside of the outdated cheapy interior and noisy V6/transmission in the AWD one we had and the mechanical power steering which sounded like a 70's nova when sitting still and turning the wheel (which the tsb requring new lines and different valving did nothing to rectify, yet the 4cyl base LS fwd had electric steering lol) DID NOT shake on the hwy at any speed.. when do you upgrade to a 3yr newer vehicle with a 15k higher msrp and feel like you downgraded? if i drove this every day i cannot lie, i could never do it... never.. thank god for the other vehicles i have access too. and thankfully the wife stays local..

my tailgate locks... the 2016's do that now. me too. and my friend's 15 Denali CC 6.2 as well. also my other friend's 15 LTZ CC 6.2 short bed with max trailer.. they all do it.. i'm convinced every last one.. and if your's doesn't? come on by, i'll take you on the hwy and point it out to you.. (only kidding if you don't notice it enjoy, you're the lucky one lol) Glad to hear that please keep reporting back after each week or whenever you come back from an extended hwy drive.. I started a thread called "how to handle this" regarding my "shimmy" vibration whatever at 75mph or so... I will say retightening the U bolts, the truck is nowhere near as bouncy as it was with the ranchos.. they were loose.. cab mount bolts were already tight as anything so doubt that helped... maybe next trick will be attaching another clamp 5" inches in front of the U bolts on the spring, read somewhere in here guys did it and it quelled much of the vibration/shimmy.

thanks brother. i am actually bringing my truck tp my friend's shop today to do some experimenting and with your experience i am going to attempt to duplicate your success. i want nothing more than to NOT think to myself "is it doing it AGAIN?" will report back. ps i am or was i'll try your resolution first, put my rear axle on his mustang load bearing awd dyno (wb is too long to put whole truck on it)

I have removed my soft tonneau and it was actually IF ANYTHING a little worse.. couldn't tell if when i pulled back onto the parkway if the pavement/elevation was the cause or the removal of the cover.. so there goes that theory.. the short bed with CC i believe is the same WB as the DC it 6.5ft bed like mine.. I will however return to the dealer now that the ride BACK (over 140 miles) disturbed me this much.. if need be i will have them road force balanced myself then call gm customer service if i am forced to pay $200 bucks or whatever. that will bother me.. especially if the wheels are PART of the issue (report showing what it actually was before vs after vs acceptable

and what size bed with the CC? the 6.5ft bed with a CC appears to NOT be mentioned often in this thread from my observation. at least for the 75 mph and up vibration. just drive back to NJ from poconos and this time with a 225lbs passenger and 100lbs rear passenger (both sat on right side of truck, front and rear) maybe 30lbs of cargo in bed and gas less than 1/2 tank and at first on route 33 traveling at 75-80 was non existent then out of the blue maybe 15 minutes into ride it just started up and this time didn't change anywhere over 75 until 90 and change (down big hill no traffic and wanted to see IF it would go away).. i just don't get it... other times during the trip didn't matter new pavement, uphill downhill just comes and goes. when i got home i was able to check my left rear wheel and the two marks are still in the same spot so that tire isn't slipping on rim, the others i couldn't find the darn mark on the ground i'll check tomorrow... I did notice that the right front wheel (which was the only one they changed weights on even though the repair order says ALL were rebalanced??) weights are all over the rim? like one 1/4oz inside then a foot or so another 1/4oz on the outside then a strip of over an ounce inside then another strip outside... what the heck is that? HAS TO BE INCORRECT. i've not noticed it since i brought it in on 12/31.. the repair order is in this thread but not on this computer so i cannot link it. scratch that.. found it.. zoom in on it and read... i'll post a pic of the inside of the wheel they rebalanced i would love to hear from someone who specializes in road force balancing to let me know if the weights all over wheel signals a problem.

well, i drove up to the poconos last night. 140 miles. the vibration comes and goes, its very slight but enough for you to know something is not right. its disheartening to say the least that such a nice truck would be so disappointing to take on a trip but its a lease. i pay 378 a month for it no money out of pocket. this is after the right front tire was rf balanced due to it supposedly being the cause. like others, it changed the frequency of the vibration but didn't quell it. neither my wife nor i travel on hwy for long enough periods of time to fight with gm over a "rented" truck. its most certainly in the rear. pinion or ring? maybe an axle or its the whole housing not in spec. convinced of it. its through the seas and floor. if it gets to the point that i cannot deal with it? then i will go back. i was in an enterprise 2015 f150 cc 5.0 18" wheels yesterday same stretch of hwy at 75 to 85mph that my truck rides like a nervous teenage boy walking into his first school dance and it was smooth as glass. the water bottle in the cupholder was perfectly still with just about no oscillating water dancing inside, only over rough pavement. i hope gm fixes them when this one goes back in 2018 because i do love everything else about it.

build date 10/15 aluminum.

yes, from what i have read and two of my friend's have that config with 6.2's both not happy but different vibrations than the rest of us complaining about. others in this thread have said their 6.5 CC have vibrations above 70 so it's again, something cumulative not a singular issue which is why WE ALL BELIEVE IT TO BE AN ENGINEERING/DESIGN FLAW that's why even when it's "fixed" it doesn't completely go away, just changes to intermittent and/or different load/speed noticeable i have said it before i'll say it again... maddening... trucks are so nice, quiet, ride great at under 55mph look great and BAM cannot go on a hwy cruise.. the main reason we bought the truck is to have the full size truck RIDE we have become accustomed too having owned so many.. never this issue.. closest was a set of tires/wheels improperly balanced..

correct and to answer that other poster's question, i too have/had the vibration in mine in the upper 70's most evident. Has since changed to intermittent same speed though. on some highways since the RF balance of the right front tire it is still bad.. but it is better overall, just not fixed.. enough to disturb me and after next weekend's 2.5 hour each way trip to the poconos i'm sure i'll be back at the dealer lol it's definitely a culmination of issues which are exacerbated under different conditions, speed / road / load.. imho.

buy a tire crayon and mark the rim to tire in two locations on each wheel. Maybe these tires are spinning on the rims now and then? Friend mentioned to me that on his 6.2 Denali CC 2015 that the bar codes were working their way out of the wheel lip and sticking out. he couldn't understand how that's even possible. never ONCE thought the tire/rim were not bonded well enough to avoid slippage.. We're not talking about 10 second race cars lol.. I'm going to do it to mine.. My front right tire was badly out of balance (according to the dealer requiring a flip 180* out on the wheel) and all others were slightly out. imagine that this was causing more problems after or even before the original Root of the vibration (driveshaft, rear, shocks etc) have been repaired?? fix one problem, another rears it's head sounds alot like tire slipping on wheel.... i hope you guys try it and report back. make sure to get on the truck especially from a stop and low speeds, that should expedite the results as that's probably when the tire would slip most.

i think it may be in the rear end. of the 3 maybe the one that shifted totally different had a different rear gear or was assembled earlier or later than the others? maybe it is just a matter of an out of spec torque gun upon manufacturing? preload set on the pinion bearing? like one of the other guys mentioned before.. the tires/wheels have to be 100% on or it exacerbates the issue (imo).. and that's PROBABLY why some that get the balancing see no improvement? the rear is just that far out of spec.. and the cab body mounts, like has been mentioned, are just not in sync with the resonance being created by this powertrain/frame... it's maddening btw, see the definition blow? this is what we are dealing with.. good part bad part it doesn't matter... whatever parts are causing this resonance are more elusive than Keyser Soze lol... sucks.. yes, i can make light of it what else can we do? UNFORTUNATELY there are way worse things in life we have to deal with... here's a quick read on frequency/resonance to break it down somewhat.. i equate the cab to the object with standing waves that is being affected by the other object moving.. when it hits 74mph is when the "MUSIC" starts lol ^^^^^^^^^^ this is the water vibrating in the bottlein the cupholders in a few of those trucks where the owner took video and linked it here.... when the water is just "buzzing" violently that's the spot- the resonance vibration.... our trucks do this naturally just to different degrees, which is where GM is dropping the ball.. they cannot (for most of us) isolate the biggest offender and "fix" that part so that the rest of the naturally occuring resonance vibration goes mostly undetected... it's just different decibel levels....