Jump to content

Recommended Posts

Posted (edited)

I also have a real bad vibration under hard acceleration. Real noticeable with a trailer hooked up. Figured it was normal. I'll let them know about it when it goes in next week

 

Sent from my SM-N900V using Tapatalk

Hopefully it helps! Unfortunately for us I feel like all the rebuilding and messing with our truck has messed it up beyond repair. Now when we drive it feels like something's just going to fall off. I can't even drive 30 min on the highway without feeling like I just want to jump out. Edited by Bdkfl
Posted (edited)

I had a small vibe over 70 and I was just going to ignore it. It wasn't as bad as some of you guys' vibe.

 

My dealer just replaced my steering rack since it was making noise while turning. Now my vibe above 70 is awful.

Edited by FormerFordGuy
Posted

I had a small vibe over 70 and I was just going to ignore it. It wasn't as bad as some of you guys' vibe.

 

My dealer just replaced my steering rack since it was making noise while turning. Now my vibe above 70 is awful.

Precisely why I haven't taken mine into the dealer, I'm afraid they'll start throwing parts at it and make a slight vibration a terrible one in the process. Lots of posts about vibrations moving around after repairs was at 45 now at 70 was in the seat now in the steering wheel and so. 2 years of this and gm still doesn't have a fix, what a joke. This was the first gm product I have bought in over a decade, switched because of poor quality control I guess nothing has changed, hopefully Toyota gets up to speed technology wise on the tundra. Probably more American labor in the tundra than my Mexico built sierra anyways.

Posted

I actually looked into a Tundra as opposed to this Sierra. I just can't get over the overall package; I feel like GM has done it better (aside from my vibration). Same goes for my issue with Ford. With Dodge I like, aside from the exterior styling. We will see if I get into a second Sierra soon....

 

 

Sent from my iPhone

Posted

Precisely why I haven't taken mine into the dealer, I'm afraid they'll start throwing parts at it and make a slight vibration a terrible one in the process. Lots of posts about vibrations moving around after repairs was at 45 now at 70 was in the seat now in the steering wheel and so. 2 years of this and gm still doesn't have a fix, what a joke. This was the first gm product I have bought in over a decade, switched because of poor quality control I guess nothing has changed, hopefully Toyota gets up to speed technology wise on the tundra. Probably more American labor in the tundra than my Mexico built sierra anyways.

I never mentioned the vibe to my dealer. I have aftermarket tires, wheels, and level/lift, so I assume they would blame it on that stuff. Plus it wasn't that bad.

 

I agree that changing parts is only going to make it worse. This is my first ever GM. It was also made in Mexico :(

Posted

For anyone who thinks these are joke posts, you are completely wrong. Completely.

We're not saying all them are wrong just quiet a few members with less than 10 posts makes you question if they really own one of these trucks or not

 

Sent from my SM-N900V using Tapatalk

Posted

But i feel in may cases it is new owners googleing their vibe and find this thread

But i feel in may cases it is new owners googleing their vibe and find this thread

Posted

But i feel in may cases it is new owners googleing their vibe and find this thread

But i feel in may cases it is new owners googleing their vibe and find this thread

We know someone that just bought a Sierra SLT Z71 last week and has less than 1,000 miles on it and went down to Key West and felt the vibration. First thing she did was start googling.

  • Like 1
Posted (edited)

We're not saying all them are wrong just quiet a few members with less than 10 posts makes you question if they really own one of these trucks or not

 

Sent from my SM-N900V using Tapatalk

So Someone new buys a new S/S has the vibration, does a search which leads them right to here, registers and voices their concern and you think somehow they aren't telling the truth.

 

I dont own a new s/s(and going on 200 posts), but I drive one at work that has the problem, should I not post here? Am I somehow wrong according to you?

 

I guess post count is the determining factor.

Edited by Pinnacle
  • Like 1
Posted (edited)

Just went to my Chevrolet dealer to drive another truck. Took a 2015 CC with 20s and thing shook the crap out of you at 74. We took it back and we asked the salesman if he'd drivin it at 74, he said no he only got to 70. Went in told the manager that at 74 it was jnbearable(seriously, no where near as bad as the GMCs we drove) and he said it's probably time we buy something else. Then proceeded to tell us he'd bet us $1000 it wouldn't bother him. WTF. You don't say that. Because you're on. My Husband said lets go and of course he didn't have time. I looked him straight in the eye and said "yes, it will bother you". We will NOT be returning to that dealership to purchase a vehicle EVER.

 

Edit: it had 31 miles on it when we took it.

Edited by Bdkfl
Posted

Let Chevrolet know how you were treated by one of their dealers. I assume you are working with a case manager, I would absolutely pass that type of experience along.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Latest Articles

  • Posts

    • Very interesting thread. Definitely didn’t expect to see this kind of mileage out of that engine. 
    • Just did an injector/HPFP replacement on Pepper at 192,400 miles; close enough to 200K, RIGHT? (If 200K is considered life end and to me it isn't). But hey, to each his own.    Have never run a catch can on this vehicle. Back side of every valve looked like a new valve spray painted semigloss black. Port walls looked 'neat' (all a normal result of passive EGR via VVT) Zero build up even in AFM cylinders. Just color. It uses no measurable oil and never has.    At 155,000 I put her on E-85 and a borescope of the cylinders at plug change showed very clean pistons and valve faces. The replaced injector tips looked new. (It was the pump piston seal that was leaking). Oh well, have six good backups.    Still gets 28 mpg on gas (highway average) and over 20 (highway) on alky. UOA's look good and runs as good now as it did when I bought it. Better in fact.    What improvement would a Catch Can provide this motor?     And given all this I expect that IF I installed one I'd see some water/gas/oil vapor accumulation. Byproducts of normal combustion.   Having said that, IF my motor used an appreciable amount of oil I'd consider it a useful 'crutch' until I had the situation corrected OR if bore polished, until I junked it or rebuilt it to stave off repeated plug fouling.    I'm not telling you what I THINK. But what its DONE.          
    • Love the look. I'm a SCSB lover myself.    Two items. 1.) A spacer changes scrub radius but this also changes when we use wheels of different offsets. A little isn't a big deal. 2.) Steel wheels, alloy wheels all have different thickness. Same effect on the stud and lug nut as a spacer. When hub centric the wheel isn't supported by the stud. It's supported by the hub. The stud just keeps it all together.  
    • I had a evap sol go bad a couple weeks ago. . I replaced it.  While watching live data at the time I saw I had some cylinder 1 misfires. No MIL but on live data I could see ~50 at startup and about 70 more after an hour a drive all on cyl 1.  I also noticed that the LTFT were -5% to -15% always.  And that bank 2 is always -3% richer than bank 1. Even across all driving modes, city, highway, etc it’s always 3% richer than bank 1. So I start with the misfire. Swapped coil, plug, and plug wires from 1 to 3. No follow. I got an Injector reseal kit, pulled the D/s injector rail, swapped #1 and #3 injectors, resealed them, reinstalled and retested.  The misfire followed to 3. So I ordered and replaced all 8 injectors, spark plugs, and plug wires. Also replaced the 1 time use fuel pipes under the intake manifold.  Injectors that were in the truck since new were  Part # 12668390.  I replaced them with # 12742701 Got from RockAuto. Pretty certain they’re genuine and the correct ones. I called a friend at a parts store who told me “the 12742701 were the correct superseded part # for the originals I was replacing”. So started truck after replacing all that and it’s running -15 - -30 LTFTs. I reset the fuel trims with GDS2 and drove it for a 60 miles trip each way. There have been no changes in the LTFTs.  I checked if the HPFP was leaking into the crankcase. I removed the pvc and watched the trims. No difference.  I checked the alcohol content and it was at 10%  I’m out of ideas here. Truck seems to run great. Just always rich on the fuel trims.  Anyone with any help or ideas would be greatly appreciated.  I ran an injector balance test just for the heck of it and it came back this. I’m confused.  I have gds2 and some other diag tools if anyone knows of anything I should test next.
    • Definitely needs to go back to the dealer. 
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...