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  1. 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.
  2. 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...
  3. 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
  4. 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...
  5. 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.
  6. 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...
  7. 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...
  8. 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
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. M

    214K 6L80 rebuild before TCC failure

    I bought my converter from transtar which supplies many of the local transmission shops, but their retail price is higher than Summit. Mid $300 is still pretty good for the billet cover and flanged hub upgrades. It will be interesting to see if the 2020+ 2500 stock GM converters are a good...
  15. M

    2021 PPV Front Brakes on 2013 Escalade ESV, and rear brake overhaul

    It is great to see that the Powerstop 2021-2023 PPV rotors are available! I had the same problem with wheel clearance for my 2011 Yukon Denali wheels, so I ended up using .250 hub centric spacers from Baer. I don't like having the wheel non-hub centric, but the braking is awesome.
  16. M

    2012 Yukn Denali -Tranmission died, 172,000 miles, what to do

    A GM replacement is a decent option, and will likely get you another 150K miles with good maintenance. And you get a reasonable warranty. $800 for the removal/install is a good price, as is the $4500 for the trans. Your only other good option is to take it to a trans specialist that will be...
  17. M

    Parking pawl replacement 6l80e

    The updated rod is GM 24280048 for the 6L80, and it is backwards compatible. The 6L90 rod is longer. The Sonnax 6L45-6L90-ZIP kit has upgrades for the valve body, and they are pretty easy. However, the critical upgrades from the kit are probably in the pump cover, so you can't do those...
  18. M

    Catch can flow discussion

    I bought the JLT and the install seemed backwards to me so I checked the instructions for any indication of inlet filter. So in the end I switched the sides so the filter was on the intake side. JLT is likely correct that the best filter placement is on the valve cover side. However, even...
  19. M

    Public Service Message - AFTERMARKT O2 sensors SUCK!

    Denso manufactures the GM O2 sensors for your 2007 Yukon. I have used Denso 02 Sensors on many vehicles including my 2011 Yukon, without issue. I don't know anything about Walker sensors, but replacing all 4 sensors with the cheapest available without even doing any analysis of the OEM sensor...
  20. M

    HELP! 2012 suburban 6L80 trans failure

    I would say yes, it is an option. The 6L80 is pretty straightforward, and parts are readily available for a reasonable price given the mass quantity of transmissions on the road. The main requirements are a good transmissions jack, large snap ring pliers ($75), pump centering tool ($150), the...
  21. M

    HELP! 2012 suburban 6L80 trans failure

    Based on Nick's analysis, I would say yes it is worth it to rebuild the 6L80. Aside from the torque converter slip problems (which is more software than mechanical), the most likely mechanical design flaw is the undersized 4-5-6 clutch. So if 4-5-6 is gone and 3-5-R is not far behind, you...
  22. M

    Diagnostic and Programming tool research - anyone use the Mongoose cable from drewtech / opusvis?

    No, all the aftermarket diag tools from the aftermarket, are essentially 'copying' the implementation of the factory diag, which mainly only interact with the computers in the car to alter 'features' which the car computer is willing to change. Most of the accepted changes are only temporary...
  23. M

    Diagnostic and Programming tool research - anyone use the Mongoose cable from drewtech / opusvis?

    Autel is certainly VERY confusing in terms of model selection, and their naming conventions are horrid. The short answer is all of the bidirectional scanners that say 28+ or higher functions provide essentially the same coverage for a 6+ year old vehicle. For some of the latest features in the...
  24. M

    Engine additive: ATS chemical.

    I used the ATS 505 on my son's 2012 TSX which was consuming oil at a quart every 1K miles at only 80K miles on the engine, with fresh Mobil1. Honda supposedly improved the oil ring tension in 2011, but the manual transmission cars still have issues. I think the recommendation was 30 minutes...
  25. M

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

    Thanks for the heads up on the brake line stretch, I didn't think to check that. My 2011 Yukon Denali factory 20" seven spokes (similar to those esky wheels) had at least 1/16" clearance on the test fit. Unfortunately, I didn't account for spacing the caliper to center on the rotor, which of...

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