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pm26

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Everything posted by pm26

  1. pm26
    I wonder if this could be handled as a safety issue, in which case GM would be forced to recall these trucks and devise a fix. In an accident the seat needs to be properly anchored to the floor and must withstand pretty high stresses during an impact. Otherwise the seat occupant can get badly hurt if the seat becomes detached.
  2. pm26
    Sorry to disappoint you, but front ends do not break in. They usually just break. If you feel vibration now, it is going to come back and get worse until the problem is corrected.
  3. pm26
    How do you design an AFM system for a single cylinder motorcycle engine?
  4. pm26
    Keep in mind that GMT900s had their share of problems when they first came out in 2007. Leaking rear main seals, lint collecting cloth seats, bumpers that would dent if you sneezed too hard, AFM shudder, AFM oil burning issues, etc.
  5. pm26
    Bullet proof, but even a falling acorn would dent their sheet metal.
  6. pm26
    Mike, you did not get the joke. You typed "fiends", not "friends" in your original post. http://www.thefreedictionary.com/fiend
  7. pm26
    Perhaps these vibration issues are a combination of mediocre tires, transmission shifting pattern programmed for maximum fuel economy( i.e shifting into higher gears too soon) and also the AFM system deactivating the cylinders. Seems to me that in their quest to maximize fuel economy , GM has shot themselves in the foot and went too far, introducing unpleasant vibration into the whole package. Maybe some trucks have a worst case stack up of these vibration levels and these are the worst ones. Have you guys tried to drive your trucks in the tow/haul mode for some time to see if the vibration is less pronounced? Tow/haul mode raises the shifting points so that at least one possible factor is eliminated. Another attempt I would make is to deactivate the AFM electronically to see if anything changes. I really hate to see anyone get rid of a new truck due to a tire issue or something that can be corrected. You will always lose thousands of dollars when trading for an equivalent new truck, no matter what make or model. Dealers these days are a lot more greedy than they were some twenty years ago when they were happy to make $ 1000 on a used vehicle. Now they want to make at least $4k or $ 5k and even that does not seem enough to some.
  8. pm26
    good fiends? Perhaps there is a very good reason not to believe them. Hahaha.....
  9. pm26
    Professional grade vibration levels. New GM truck commercial.
  10. pm26
    Today I asked about this problem at my local Chevy dealer and they acted as if this was news to them. Just how widespread is this vibration issue? Just out of curiosity I will test drive a new 2014 Silverado with Goodyear Wrangler tires and see how it rides.
  11. pm26
    It looks like you got a free max vibration package with your truck.
  12. pm26
    Didn't Ford have serious vibration issues several years ago with their F150 truck? I remember reading a lot of complaints on Ford forums. Was it a design issue? I wonder if GM is not going though the same thing with the 2014 model 1/2 tons.
  13. pm26
    Anybody tried to have their wheels balanced on the truck? Years ago they had small portable balancers that would spin up the wheels directly on the vehicle and balance them this way. This type of balancing took care of any problems with unbalanced brake rotors and brake drums. I wonder if any tire shops still have these balancers. If I was having persistent vibration issues, I would give this technique a try if someone still has one of those machines. Also keep in mind that brake rotors and drums need to be balanced properly too for a vibration free ride. Good quality rotors are typically balanced by machining some metal from the heavy part of the rotor. Brake drums typically will have a weight spot welded on them. Check to make sure that you have your brake rotors and drums balanced. Some cheap Chinese brake rotors sold at discount auto parts stores are not even balanced. I hope that GM does not use anything like that on their trucks. Balancing wheels while mounted on your truck takes care of any imbalance problems in the brake rotors and drums. The downside is that you cannot rotate the wheels or reposition them without disturbing the balance. Years ago they also used thread truing machines that would shave the tire into a perfect round shape. They were really effective with bias ply tires of the 60s and 70s. I have not seen one of those machines in years.
  14. pm26
    Do you really believe that Chevrolet is not aware of the issue? BS. They are just trying to cover it up, in absence of any workable solution at this time.
  15. pm26
    I typically never buy first year redesigned vehicles, no matter what the make and model. They all seem to have some issues, some worse than others. But these vibration problems are very frustrating. Have tried running slightly lower pressure in your tires to see if the ride is less harsh? I mean 2 to 4 psi less, anything beyond that may be unsafe.
  16. pm26
    Balancing tires properly is a neverending problem. Tires on my '09 Impala LTZ are difficult to balance for some reason and usually it takes three tries to get them balanced perfectly. I get a smooth ride for 20k miles if they are done right, so I know the tires are good. Generally the larger the tire diameter, the more difficult they are to balance properly. And cars are typically more sensitive to improperly balanced tires than trucks.
  17. pm26
    They must have got a really good deal on a train load of these lousy tires. Which in the end was a very bad deal after all. Or, there is another problem somewhere and they have no idea what.
  18. pm26
    It may have a lot to do with an individual's body weight. Lighter people probably experience fewer problems.
  19. pm26
    I drive that much too, except I put all those miles on a car, not my truck. Much better fuel economy.
  20. pm26
    Just becuase they balanced the wheels does not mean they balanced them correctly. My local dealer "balanced" one of my '09 Impala hweels so bad that it was 1 ounce out! This was discovered on another Hunter 9700 balancing machine in a different location. The wheel was rechecked about a day later and it was still properly balanced. The problem is often not the machine, but the operator and how he mounts the wheel on the balancer. With some wheels, like my Impala 18" wheels, it is better to use a centering cone on the outside of the wheel. If you use a cone on the inside, you may not cetner the wheel properly. Ideally, they should have a lug hole adapter that holds the wheel in the same position as on the car/truck. these adapters are available from Haweka, but they cost about $ 1,500/set so few dealerships have them. This is how they balance wheels at the factory. Using proper adapters.
  21. pm26
    For the money they are asking for these vehicles, they should not have issues like this. GM still has ways to go as far as quality control is concerned. I am also surprised that the ride is so harsh with the Z71 suspension. It is not that bad on my '06 truck which I will keep because my mileage is so low and I am afraid that I might end up with headaches with a new one..
  22. pm26
    Losing 100 lbs?
  23. pm26
    I considered trading my truck for a GMT900 3/4 ton or 1 ton, but when I look at the prices of new trucks I change my mind.
  24. pm26
    In order to get nicer door panels on the GMT900 series, you must buy the LTZ version which is quite pricey. The hard plastic door panels on other trim levels look super cheap.
  25. pm26
    A falling acorn denting the hood is the best testimony of solid construction of GMT900 trucks. I wonder what a pine cone would do?
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