mobile-menu-icon
GM Authority

Repeated Engines Failing

Viewing 8 reply threads
  • Author
    Posts
    • October 17, 2021 at 10:04 am #675940
      wayneb.luck
      Participant

      Hoping for some insight. I have a 2009 GMC Sierra 4wd, 5.3L (original) engine. The original engine died at 78K and it was determined to be a known GMC issue with scoring the cylinders etc. A GMC remanufactured (second) engine was installed and I paid 1000. The replacement (second) engine had valve failures that were repaired. Ultimately it died at 132,000 miles with catastrophic engine failure. I paid for a GMC remanufactured (third) engine. This (third) engine died at 172,000 of a similar fate. I paid for a GMC remanufactured (fourth) engine. This fourth engine just died at 194K miles. Thankfully this one is still under warranty. All engines were installed by the GMC dealership. My truck is regularly maintained with oil changes on or ahead of schedule. I don’t race it, offroad or dog it in any way. We do tow a 3800lb travel trailer and I use the trailer tow mode and never over 65mph.

      There has got to be a common denominator causing these failures other than towing a small trailer. Could the Advance Engine Control Module in the Active Fuel Management system be causing the valves to engage and disengage abnormally or could it be something else.

      I go back to the dealership Monday for a discussion. Thanks

    • October 17, 2021 at 6:26 pm #675951
      Z15
      Participant

      What kind of oil are you using? Viscosity that is called for, 5W-30 or something else.

    • October 17, 2021 at 7:01 pm #675952
      wayneb.luck
      Participant

      Mobil 1 5W-30

    • October 17, 2021 at 7:45 pm #675953
      Z15
      Participant

      You personally install the oil or you trust the dealer? Dealers service advisers are clueless and have little to no knowledge what the service dept is using. They may not be actually using Mobil 1 but some bulk oil that is supposedly equivalent to Mobil 1. You would be wise to buy the oil yourself and then you know for sure its actually Mobil 1.

    • October 17, 2021 at 7:56 pm #675954
      wayneb.luck
      Participant

      I trust my garage and have watched the change. And change ahead of schedule. Thanks

    • October 18, 2021 at 7:04 am #675964
      Z15
      Participant

      Well I personally don’t think its an engine problem. One bad engine maybe but 4? I’d look somewhere else for the problem. Change dealers and brands of oil.

      • This reply was modified 3 years, 5 months ago by Z15.
    • October 23, 2021 at 10:50 am #676952
      abigailholland
      Participant

      If you want to impress your pet, check out the hill’s science diet cat food reviews. It is, probably, the exact option you are looking for.
      https://topratedcatfoods.com/hills-science-diet-cat-food-review

    • December 7, 2021 at 9:23 am #682954
      Combinedpumps
      Participant

      Thanks for sharing this amazing post! I found many interesting things in it. https://combinedpumps.com/

    • December 8, 2021 at 6:12 pm #683205
      pridgjl
      Participant

      Help- It’s my understanding that these lifter/valve issues (both AFM and DFM) have been around for a number of years. I even have read that GM has sent letters to dealers to repair inventory on lots for the 2021 model year. Does anyone know if they fixed this issue for the refreshed 2022?

  • Author
    Posts
Viewing 8 reply threads
  • You must be logged in to reply to this topic.

Subscribe to GM Authority

For around-the-clock GM news coverage

We'll send you one email per day with the latest GM news. It's totally free.