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greyjimmy

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  • Name
    Everett Byrom III
  • Location
    Austin, Texas
  • Drives
    2015 GMC Sierra LTZ 4x4

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  1. greyjimmy
    greyjimmy changed their profile photo
  2. greyjimmy
    That mileage is incredible. My 2015 gets an average of 17 mpg. Rarely gets over 21 even on the highway. Has there been a significant change in three years? I bought it two months ago with 60,000 miles and at 62,000 the #7 cylinder lifters collapsed. Dealership was great though, towed it and turned it around in three days.
  3. greyjimmy
    Thank you for the info. I hope more will post there regarding their lifter issues. I am curious as to whether muliple lifters go out or if it tends to be #7 and thats it. Ive got 34,000 miles on my warranty so I hope the others fail now if they are going to at all.
  4. greyjimmy
    Dealership did as they said they would do and the truck is back to normal. Covered by warranty and turned around in three days. Runs like a top again.
  5. greyjimmy
    I heard from the dealership today. To recap, My 2015 Sierra 5.3 just had the same thing happen. 62,000 miles. It occurred as I was merging into traffic from a stop to at about 25 mph. It suddenly stuttered then check engine light came on and the traction control light on the dash. I pulled over and could hear the lifter knocking. It threw a P0300 and P0307 code. I had it towed to the dealer, it's lifter #7. It will be covered by warranty. They will replace the lifters on that bank but not the other side. I will have to pay for that myself. They are going to check the camshaft for pitting as well. I've only had the truck for 6 weeks so I don't know it's history as I bought it from the dealer andmost of it's service was done elsewhere. I'll post the progress.
  6. greyjimmy
    Yes thank goodness.
  7. greyjimmy
    Thats a good question. My 2015 Sierra with 62000 miles just went into limp mode and the engine definitely sounds like a lifter is sticking. I towed it to the dealership, we'll see what they have to say.
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