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  1. Quark

    2021 Tahoe Z71

    GM introduced the DFM engines in the 2019 pickups so they've been out there and they've been having this problem since the Fall of 2018. That's going on three years and GM doesn't have a solution. My solution is don't buy it.
  2. Quark

    2022 Sierra is getting Super Cruise... Poll, do you think the Yukon Denali or all Yukon's will get it too?

    If improved reliability were an option I would order that before Super Cruise or even powered running boards, panoramic sun roof, rear entertainment, 22" wheels, head up display, power sliding console, yada yada and etc., etc.. Though rear pedestrian alert might come in handy, the neighbor's cat...
  3. Quark

    2022 Sierra is getting Super Cruise... Poll, do you think the Yukon Denali or all Yukon's will get it too?

    Super Cruise would be nice on long interstate sections though sometimes it seems my 2012 drives itself and I'm just along for the ride. The only time I intervene is to avoid some rough patches or manuever around a Sunday driver and I don't see me being content to let SC handle those...
  4. Quark

    Lifters

    The more complex the design the greater the potential of failure when mass produced. The system could be made to be close to 100% reliable but with added cost. GM engineers design it as well as possible staying within budget but knowing failures will occur. Failures in the field are analyzed and...
  5. Quark

    Lifters

    I'm currently going with the hypothesis that it's a failure of design. The PCM sends a signal to the high oil pressure solenoid to switch the lifter off and on at prescisly the right time. The problem might be programming, PCM fault, solenoid delay, oil pressure issue, or a vast array of...
  6. Quark

    Lifters

    You didn't infer anything you stated, "The fact that dealers are replacing these lifters with fixed parts tells me the supplier produced a bad batch." It is not a "bad batch".
  7. Quark

    Lifters

    I can tell you are more knowledgeable about this than I am. My 2012 has not had a problem and knowing this was corrected I can quit worrying. One thing is certain, I won't be replacing my Ol' Hoe till they figure this out.
  8. Quark

    Lifters

    You are stating the obvious that manufacturers are continually cutting costs. One other thing that keeps manufacturers in business is quality and continual improvement however if you look at American dependability rates we aren't doing it right. If GM were dealing with a bad batch of...
  9. Quark

    Lifters

    Please excuse and correct me if I'm wrong, the broken valve springs were attributed to a limited run of faulty parts but the collapsed lifter/bent push rods failure is an ongoing problem and has been reported regularly by truck owners for years.
  10. Quark

    Lifters

    Though it sounds that poor management hastened the inevitable. Hiring from a pool of an increasingly indignant population would be a daunting task especially finding managers who can make or break systems that were once quite efficient. Our plant once hired a guard off the gate as a skilled...
  11. Quark

    Lifters

    Welcome to TYF. The lifter problem on the 8 cyl GMs is a common one. Several recent buyers have posted they are selling their recently purchased GM SUVs. Nothing in your post can be disputed as GM has opened itself to criticism from a quality standpoint. As a former GM employee I suspect...
  12. Quark

    Thinking of Selling my AT4

    Pickups are forever but I need to secure valuable gear for events I attend so I drives a suv. Good luck with your endeavor.
  13. Quark

    2021 Tahoe 5.3 engine failure at 4,800 miles

    Please list build dates for those having engine problems. It will help to evaluate whether it is an ongoing concern or not.
  14. Quark

    Concerns with new generation Yukon

    All automakers should be held to a higher standard.
  15. Quark

    What did you do to your 21+ T1XX today?

    Sorry but have to ask is that a ridge in the finish on close up of hood? Overall truck looks very nice.
  16. Quark

    Cabin air pressure

    If the result is less booming inside the vehicle you might have found the cause though correcting it permanently might be problematic without reengineering the ceiling attachment design. I will bet something is exciting a bass node with a standing wave inside the cabin. I believe some of these...
  17. Quark

    Look these awful awful people!

    Have to agree and with declining quality from t-shirts to home appliances many a time I wish I'd bought two or three when they were worth bringing home.
  18. Quark

    Concerns with new generation Yukon

    Youtube has many videos of GM lifter problems. As far as I can tell it affects recent year trucks both 5.3 and 6.2. I doubt the 2022s will be any different unless GM makes a design change.
  19. Quark

    Should I stick with my Premium pkg ordered Yukon Denali or get one less equipped available now?

    A Denali without power running boards would be like a birthday cake without candles. I would wait.
  20. Quark

    Look these awful awful people!

    The future has promise. Lexus has some new suvs coming and the updated Navigator will be presented. Neither have lifter problems.
  21. Quark

    Look these awful awful people!

    To complete the analogy, you are very hungry for some salty chips and the county is void of this tasty treat. You've considered driving to a store 2 counties away. Sodas are next.
  22. Quark

    Look these awful awful people!

    Here is one from a year and a half ago, never sold with 187 miles. The dealer was still taking bids.
  23. Quark

    Look these awful awful people!

    Rising gasoline prices will inevitably slow sales of these land barges how high will they go.
  24. Quark

    Nasty looking oil after 5200 miles of driving

    You have measured these micro particles and discovered they are becoming larger as the filter ages?
  25. Quark

    Start up and Reverse Noise

    It's the lifters taking roll-call.

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