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  1. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    Excellent! BTW, No way I could work in the garage with stylish white shoes and not cover them with dirt/grease.
  2. M

    VLOM removed from valley cover

    Also if you are deleting the VLOM solenoids, you need to block the oil pressure passage that feeds them, because they are under constant oil pressure and removing the solenoids will also cause oil pressure loss, unless you switch to a non DOD valley cover.
  3. M

    VLOM removed from valley cover

    Factory AFM/DOD is designed to provide oil pressure via the VLOM towards the DOD lifters when activated and release back-pressure from the DOD lifters when not activated. If you are disabling AFM/DOD and keeping the stock lifter you need to leave the towers unblocked so that no oil pressure...
  4. M

    New fuel pump

    Wow that is an insane amount of rust! The inability to pump fuel is almost always caused by a restriction or blockage in the vent path which goes through the EVAP canister. If you have to drop the tank for a major repair, it is a good time to flush the vent line and replace the canister...
  5. M

    Running A CVC BU60FHD Converter with Zeroed-Out Clutch Slip Target -- Any Advice/Experience?

    I have the CVC BU60FHD converter, with only 5/6 TCC lockup and zero-slip. And it works quite well. It is the best value that I know for a stock upgrade. General wisdom for 6L80 converter clutches is that the GM woven carbon clutches are the best for TCC slip, and I think that Sonnax is the...
  6. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    Yes the calipers are aluminum not composite. The 2021 GM PPV and the GM Brembo upgrade are very similar and probably functionally equivalent for most people. For 2024 it is a bolton. The outside diameter and the width of the rotor are the same. The major difference is the inside diameter...
  7. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    This thread is not about comparing all the brake upgrade options and it is certainly not an aftermarket vs oem. It is purely about retrofitting a pretty cool GM factory option, with only some minor compromises (offset fitments for caliper and/or wheels).
  8. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    The correct thread size is 10MMx1 for the 2022 PPV calipers. 3/8-24 is the metric equivalent of the about 9.525x1.058. It will still fit because the diameter is smaller and the pitch is close, but it will gall the aluminum threads on the caliper under proper tightening torque. Some the bolt...
  9. M

    TCC line pressure (vs load) causes TCC slip

    I am certain that the 2020 dual clutch is stronger (high torque holding) is a much better choice for towing. It should also work better at the same line pressure vs a single. It seems that the factory clutch material has the highest coefficient of friction in the 2% or less slip range. The...
  10. M

    RPM Fluctuation

    If it runs better with the AFM delete tune, then definitely use that one. I possibly has additional tuning for the trans.
  11. M

    TCC line pressure (vs load) causes TCC slip

    I discovered this on my 2011 Yukon 6L80 awhile back and forgot to share it. This is primarily TCC engaged in 5th gear (or possibly 6th) in the sub 2000 rpm range, with desired TCC slip of '0' (programmed not stock). At low load, the TCC line pressure has a lower threshold, effectively the...
  12. M

    RPM Fluctuation

    That is classic TCC slip. The Sonnax TCC valve will help, but I think the bigger part of the problem is the actual software logic around the way the pressure on the TCC is estimated and applied. Without going to a different converter, I think the best pseudo-fix is to increase the offset...
  13. M

    2014 Yukon XL Denali - Pre-Purchase Inspection (AWD System)

    Definitely recommend replacing all the fluids. The flywheel looks pretty dry to me. The inspection hole is wet because oil leaks drip down the outside of the bell housing to that low spot. Either from the oil cooler gasket or the oil pressure switch or both.
  14. M

    2014 Yukon XL Denali - Pre-Purchase Inspection (AWD System)

    I agree with @wjburken, they are making a note that it is AWD, because it adds to the complexity of replacing the main bearings. I suspect the oil pressure is low enough (possibly a bad pressure sensor), or maybe a failing pickup o-ring, that they would think it needs new bearings. I think it...
  15. M

    time to break up with denial…guess who. 6L80!!!

    Checkballs! Make sure you are searching for a set of checkballs on the internet! Just wanted to clarify that... :) The Sonnax zip kit includes 8 checkballs (.25") so you should be good to go. https://www.sonnax.com/parts/3505-zip-kit
  16. M

    Summitt Racing - Torque Converter

    I have the CVC BU60FHD based on a recommendation by @Geotrash. Summit also has the flanged version for a few extra dollars, so I recommend that one. https://www.summitracing.com/parts/ccv-tqbu60fhd I don't think you can find a billet cover rebuild with a warranty for less. The downside is that...
  17. M

    First year ownership and 5K miles 2011 Yukon Denali

    Looks like Storm Gray, code WA707S. As @Geotrash said, it is beautiful. Definitely the best color for 2011 year. It looks very close to Thunder Gray, which is my favorite GM color.
  18. M

    First year ownership and 5K miles 2011 Yukon Denali

    The stock rockers are amazing... lightweight and very strong. Yes, the trunnion upgrade is probably not needed, but I figured it was a good idea to replace the bearings. I had these already on the shelf and wanted to use the CHE bronze bearings for my CTS-V instead of the Brian Tooley rollers...
  19. M

    First year ownership and 5K miles 2011 Yukon Denali

    That is very true. I think the increased reliability can breed a lack of concern for maintenance. I also feel like some of these computerized maintenance minders imply that 8,000 miles is ok for oil change and maybe some will just think the yellow/orange light is more like a suggestion. It...
  20. M

    Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

    The fluid displacement volume is slightly lower for the PPV calipers vs stock GMT900, so going to a larger master cylinder would have a negative effect. Which is why this upgrade is so ideal because you don't need to change the master, or compromise with longer pedal movement
  21. M

    First year ownership and 5K miles 2011 Yukon Denali

    I deactivated AFM in the computer and I inserted a blocking ring into the manifold to block oil pressure to the solenoids. The window sticker showed this was sold through a local dealer. It was also sold as CPO around 100K miles, so it was clearly well maintained and the CPO purchase included...
  22. M

    First year ownership and 5K miles 2011 Yukon Denali

    So a little backstory.... My friend is looking for a used truck to replace his tired 2003 Ford F150 with something safer, but not too new that he is afraid for his 15 year old to drive it to school. Late 2022, he brings me a 2013 Silverado from the Northeast. Aside from the rust, I am pretty...
  23. M

    First year ownership and 5K miles 2011 Yukon Denali

    I'm looking at my recent NC safety emissions report and it is 5K miles (219K) since I had it inspected last year at 214K miles. I actually had to get a 10-day tag and pay a fine to take it for inspection because it was 2.5 months from when I bought it and past due for inspection. I'm not...
  24. M

    Tail light harness

    Frayed wire or any loose connection can definitely cause excess heat. However the heat is colocated at the point of resistance. For a simple filament bulb with a consistent resistive load, a frayed wire upstream would reduce the voltage across the bulb and therefore the bulb temperature. It...
  25. M

    Tail light harness

    One of the many things I love about the Yukon is that there are so many that GM can make/sell high demand parts for a very reasonable cost. $30 shipped for a brand new GM tail light harness from Amazon no less. However, on the flip side, the harness I was replacing because of broken pin on the...

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