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  1. J

    BREAKING: GM is officially recalling the L87

    I have not heard anyone that has had an engine failure indicate the presence of either a Low Oil Pressure or High Oil Temperature warning. Few indicated they heard any noises or knocking before a failure.
  2. J

    BREAKING: GM is officially recalling the L87

    I fully understand what I am writing and what I am talking about. Part numbers do not need to change because of a part build moved to a different plant. The 6.2l crank either missed a finishing process and/or the finishing process was wrong. So the exact same part casting and part number has now...
  3. J

    Fuel efficiency drop in newer models ?

    I have not played with the Tow Mode much yet. As a side not, it has been confirmed that even in Sport and Tow mode, DFM is still active, maybe not as active, but still active. Typically Tow mode will delay upshifts and may even keep the transmission from shifting into 10th gear?? I also assume...
  4. J

    Fuel efficiency drop in newer models ?

    The Fuel Economy Display is very helpful if and when you start to pay attention and learn how it functions. You can easily see when you are coasting, on light throttle, pulling grades and so forth and how it impacts your fuel economy. While not a 100% correlation, I have figured out when the...
  5. J

    BREAKING: GM is officially recalling the L87

    Vladimir, You clearly do not understand the issue with the crankshaft, it is not a different part. Same casting, same finishing process, just the finishing process had some errors that have now supposedly been corrected and addressed. Should GM maybe have changed the part number to eliminate...
  6. J

    Project Carbon Next Gen 10 Speed Valve Body Kit - Finally Installed!

    This YouTube video is worth a watch in the link below Interview with NextGen
  7. J

    Fuel efficiency drop in newer models ?

    Fuel economy on these bricks starts to rapidly diminish over 65 MPH. The problem is when people are pushing these bricks at 75-80 MPH, you cannot expect much, this is not how the EPA fuel economy is tested. Additionally anyone that has a 6.2l is likely using the right pedal a lot to get around...
  8. J

    BREAKING: GM is officially recalling the L87

    Only the lawyers will get rich with any of these lawsuits. You'll get a $500 discount coupon on your next GM purchase! I'm not worried about my fuel economy, I'm worried about my engine not failing. This give a new meaning to Range Anxiety, how many miles before the engine fails!
  9. J

    BREAKING: GM is officially recalling the L87

    While we as the Internet community do not know exactly what went wrong with these 6.2l engines, based on GM's comments in the recall documents and others that are in the know, it seems the crankshaft final polishing may have been a major factor in these failures. To run thin engine oil, the...
  10. J

    BREAKING: GM is officially recalling the L87

    https://www.freedomracing.com/ch-51450-scope-b-diagnostic-oscilloscope.html?srsltid=AfmBOopMkjQrwXafkXqkAbKQSruARjCPklsXL6iVW_RxzIlZlflsAi4D https://www.picoauto.com/products/automotive-oscilloscope-kit/overview Yea, this will be interesting. This was a 10 year old special tool that dealers...
  11. J

    Oil Capacity Question/Verification

    Appreciate your 2 cents, but something is CLEARLY wrong when the manufacturer delivers and engine with an oil level that is "above spec". I have been in many industries and I have seen many "specs" be wrong, misprints typos and so forth. GM is not going to be putting in extra oil in millions...
  12. J

    Transmission valve body-no parts to be found

    @Staceyr72 Glad you finally were able to get you vehicle back. I do not mean to be a Debbie Downer, but pay very close attention to how the new transmission is shifting. Even the replacement transmission have the same basic valve body problems. If you notice any unusual shifting problems...
  13. J

    NHTSA opens preliminary probe into more than 870,000 GM vehicles

    Need to vet your source(s) and the source(s) need to have confidence in the presenter. Tip toe around a bit until both parties are comfortable. Hopefully there will be more to come.
  14. J

    NHTSA opens preliminary probe into more than 870,000 GM vehicles

    I was aware of the 6.2l cranks being made in Mexico and assumed GM moved production back to the US. Not sure the video has a lot of solid smoking gun stuff at the moment, but usually inside sources need to feel out the presenter to make sure they are comfortable what info they provide...
  15. J

    NHTSA opens preliminary probe into more than 870,000 GM vehicles

    YouTube Video With Some GM Inside Info
  16. J

    Oil Capacity Question/Verification

    I do, used to work for GM, know a bit about how they operate. I am also not just some DIYer, I made my living in the automotive industry for many years. If GM engineers were so smart we would not have 600,000 6.2l engines in questions and valve bodies still failing for the same reasons as they...
  17. J

    2021 yukon xl getting new rear end at 60K miles

    First the 6.2l failures, then the 10 speed valve body problems, now the rear differential!!! I guess the surface finish on the rear differential gears was not correct just like the crankshaft finish?? The entire powertrain seems to be a problem in this vintage chassis. What do we have to look...
  18. J

    Oil Capacity Question/Verification

    I have heard this same crap from many who commented on this thread. Do you REALIZE that I matched the oil level found in the engine when the vehicle was delivered? Do you REALIZE I have checked multiple other new vehicles and found the exact same situation? Do you REALIZE this the level is...
  19. J

    Oil Capacity Question/Verification

    Look ay my dipstick picture above. These dipsticks suck and make the true level hard to determine Your 2012 spec was probably 8.5 qts until GM put out a bulletin that changed the spec to 8.0 qts. Then GM did an about face and went back to 8.5 quarts. They cannot seem to make their mind up. See...
  20. J

    BREAKING: GM is officially recalling the L87

    No, only engines built on or after July 1, 2024 are supposed to be "good". Look at the build date on door jam sticker and assume the engine was built 2-4 weeks before the vehicle was built
  21. J

    Fuel efficiency drop in newer models ?

    That's not unusual if you live in a Metro area. It used to take my wife 45 minutes to drive home 7 miles
  22. J

    Oil Capacity Question/Verification

    @Z15 Sorry this is clearly not the case these engines take nine quarts. That's what factory fill is and that's what we've matched and many members and people outside the forum have seen the same thing. But do what you want and follow a piece of paper.
  23. J

    BREAKING: GM is officially recalling the L87

    More likely some late July vehicle build dates are safe and probably most of the Aug/Sept 2024 vehicle build dates are safe. Again, my vehicle is a 8/2024 build, but I have verified the engine build date is July, 15, 2024 based on the build tag on the rear of the drivers side cylinder head. At...
  24. J

    BREAKING: GM is officially recalling the L87

    The issue is you as the owner can only determine the Build Month and Year of the vehicle based on the door tag or a more advances online VIN decoder, not the actual vehicle build day/date. GM has this information based on VIN, but I am not even sure dealers have immediate access to this...
  25. J

    Oil Capacity Question/Verification

    @viven44 Thanks for the feedback. You are seeing the exact same thing I was seeing, these engines need at least 20 minutes of DRIVING, not idling, for the oil to reach 200F and this is at ambient temps of 50F or higher, below 40F 30+ minutes of DRIVING. The oil takes much longer to warm up if...
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