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Chevy Silverado and GMC Sierra Noise and Vibration



  • I have a 2013 Silverado Extended Cab that vibrates right at the shift point between V4 and V8 mode - between 1100 and 1500 rpm, 40 to 45 mph. Dealer says vehicle is operating as designed and that he can do nothing to fix it. I can't believe that GM puts vehicles on the road that have this issue. Does anyone know of a fix?
  • obyoneobyone Posts: 8,065
    Ask the dealer do a test drive on a similar model on the sales lot. It will be quickly established whether he's blowing smoke or not.


    Call the GM customer service line in your owners manual and file a complaint. They could refer you to a more accommodating dealer.


    As your current dealer is telling with it.
  • chuck1chuck1 Posts: 1,405
    There is a fix-it's aftermarket. This device cuts off the AFM. Owners have reported no significant mpg loss. Some have reported a slight increase in mpg.
  • ceb66ceb66 Posts: 70

    Check the transmission Forum. And believe it. They do "put em' on the road!

    Since at least 2010 when they began to appease the Feds and increase "CAFE (fuel mileage) standards" in return for the TARP Money, GM has been very aware of the AFM and transmission complaints. The growling, lagging, thump-"what-the ....-was-that" complaints etc.
  • digshotdigshot Posts: 2
    I am getting vibration and humming from my front end that increases with speed. It does not affect the steering (it's not wobbling). Took it into Big O Tires and they realigned the front end, and said the wheel bearings are fine. This did not solve the problem, it's still there and seems to be getting worse. They said it was the sound of the tires. This is not the tires. It seems to stop when I turn to the right, and I think it is affecting power also. I've seen several posts for something similar, has anyone ever found a solution? I want to know what I'm talking about before I take it in for repair.
  • digshotdigshot Posts: 2
    I'm thinking it has something to do with the differential. There appears to be solidified oil that has been leaking and flowing back toward transmission.
  • barbirvingbarbirving Posts: 1

    I did customer service for GM and handled many, many calls about this same issue. We were always told to refer the customer to the dealer. I feel the customers were only given the run around and I am sure that GM knew exactly what was causing the problem. Most of the calls that had this issue were the Silverado regular cab long bed.

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