Getting a vibration a freeway speeds. Don't think it's a balance problem as it comes and goes. I have not noticed it when driving up the mountain roads with cruse set at 75 mph, but it really starts to vibrate when going down hill or on the flat when the engine goes into the V-4 mode? I have read many complaints from others having the same problem. Has anyone considered it could be the fuel management system causing this problem? If it was a tire issue or drive shaft problem it would vibrate all the time at highway speeds. Mine only does it when it's in the V-4 mode? Anyone else notice this problem only vibrates in the V-4 mode?
I got a new 2014 silverado work truck whit 15 miles on it at first it was excellent, at about 200 miles the truck started to have a bad idle not smooth anymore and when its cold it can be felt more changed fuel types higher octane of 91 and tried E85 and no change. i already tuck it to the dealer 2 times at 2 different ones and they say the same thing,they say "it has no codes is working ok, it could be how the truck works after brake in and we have no updates or recalls for rough idle, we don't feel anything" they would feel it if it their truck and its a warranty issue. I been searching and looks like I'm not the only one whit that problem whit a GM truck
I would stay away from this model until Chevy fixes serious defect in build quality. I bought my truck about a month ago. On test drive before signing paperwork I mentioned to the salesperson a loud humm at speeds over 30 mph. We thought it was tires breaking in. Well, after a month of aggrevating
noise, took it back to dealer. Service states something in rear was over torqued and bearings need replacing. At 1900 miles!!!!
So now, my truck has been in dealer shop for a week because Chevy claims part is on "back order"!!!!
This is a new truck!
Meanwhile I've got work that I can't get done.
If Chevy is reading this my case number is 711251316207
I've avoided GM products for many years due to the quality of design and workmanship. I was pleasantly surprised when I first drove this truck in '14 & and I still a fan today - would definitely buy it again. Highs - very good mileage for a 7000lb vehicle, very quiet interior, driver interface is very good once you're familiar with it, no problems/repairs other than recalls below, numerous power outlets & usb ports, towing set-up is a breeze, tailgate & bed step features are great. Lows - navigation is ancient tech - use your cell, satellite radio has spotty reception, 3 recalls for minor stuff (seat belt/software upgrade/ trailer hitch), turn radius is poor, throttle response is not linear - slow off the line - suspect this by intent to help gas mileage & reduce wheel spin in 2 wheel drive mode - but okay once you get used to it, dealer maintenance experience (gengris chevy) has been poor - they just don't give a damn about you as a customer.
Within last month when i go to slow down it makes a clunking noises underneath. Sounds like the driveshaft or u joint is clunking. Took to dealer they had it 4 days and told me it was fine. They said everything is normal. It also has rattling noises in cab. So a truck that i bought new with 11,000 miles on it today making clunking noises is normal. Well that sucks. The dealer is of no help they say GM says its normal too.