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  1. J

    Possible Trans or TCC Issue

    Our new to us 2017 yukon XL denali with 6.2 8 speed (173K miles) has what I originally thought to be possible sputter/misfire issues recently so I started with the basics. Changed spark plugs and wires (cylinder 8 is a real B*tch FYI), removed and cleaned the throttle body and added a catch can...
  2. J

    Shift into park Message

    We left the battery disconnected over night, which cleared any codes, and have about 200 miles on it since with the issue not coming back. Not saying anything was fixed, nor that I know what could have caused this in the first place but for right now that error hasn't resurfaced
  3. J

    Shift into park Message

    No idea on the cable, I honestly thought everything was electronic and there wasn’t a physical cable anymore lol. It’s an 8 speed if that helps? It shifts in and out of gear and drives but doesn’t register that it’s in park and won’t turn the electronics all the way off. Where is
  4. J

    Shift into park Message

    So our 2017 Yukon 6.2 started acting up. While shutting the car off the check engine light came on and it has a message of “shift into park” the car is in park and runs and drives ok but the gear indicator doesn’t show in any gear on the dash and with this message the car never really turns off...
  5. J

    Spark Plugs - 41-168 vs 41-114 - Which is better?

    For what it’s worth my local dealer confirmed OE is calling for the 168 plug and he “thinks” it superseded the 114 but can’t tell for sure and didn’t know what the difference, if any, would be.
  6. J

    Spark Plugs - 41-168 vs 41-114 - Which is better?

    I’m not the original creator but mine is a 6.2. Just looked up rock auto and they list the 168 so maybe something has changed? Not sure what the difference is or if they changed from the 114 to 168. I’ll try calling the local dealer tomorrow when they open and see if they can shed some light
  7. J

    Spark Plugs - 41-168 vs 41-114 - Which is better?

    Does anyone know? I just pulled a 41-114 from my ‘17 6.2 that looks like it has all of the 170k miles on it, it is toast. But the local orielleys says the 114 doesn’t fit my vehicle? I’m hoping new plugs helps with the sort of sputter it has under acceleration.
  8. J

    Suburban/Tahoe/Yukon OEM Kicker 200w Powered Subwoofer Kit

    Would this kit (kicker PSUTA15) still be the best option for adding a sub to my 2017 XL Denali? My wife uses the storage space in the back so a box back there wouldn’t be an option.
  9. J

    RPMs jumping when driving

    Is it like a stutter/surge from possible fuel delivery issue or more like a miss from either a sensor spazing out of wires arching, since you replaced those plug wires I would assume not this exactly but still a type of "feel" when driving if that makes sense haha.
  10. J

    AFM/DOD Questions

    Whole lot of info over my head so I’ll just take your word for it and sssume there are different “levels” of tuning as I know for a fact my diesel truck had an EFI live tune on it and it failed smog and flagged my vin to the state. I had to then return it to stock tune (not that big of a deal)...
  11. J

    AFM/DOD Questions

    When using the Seagram did he use the digger type through the throttle body or did he suck it through a vacuum line somewhere on the engine?
  12. J

    AFM/DOD Questions

    Absolutely! I love CA but hate those running it.
  13. J

    AFM/DOD Questions

    A friend just warned me that here in CA at least, the scanners used for our Smog/emissions testing required every other year can detect if the ECU has been reprogrammed in anyway from stock and will fail and flag in the system. He said I should only get the type that is removable from the OBD...
  14. J

    Blu Ray Issue

    Our new to us 17 Yukon XL Denali plays DVDs without issue however when we change to a Blu Ray the player freezes, stumbles and sometimes wont play. Has anyone else had this issue? Not sure if it needs a software update and if so if I have to pay the dealership for that? Everything else seems to...
  15. J

    2017 Tahoe 6 speed - question about trans thermostat?

    would the same steps be needed for a 6.2 4x4 with the 8 speed?
  16. J

    AFM/DOD Questions

    By ecu tune do you mean something like this with there level 2 kit etc or a full on chassis Dyno tune session? https://www.amsracing.net/collections/tuning-services/products/gm-chevy-e92-ecu-gen-v-5-3-6-2-afm-dod-active-fuel-displacement-on-demand-delete-tuning?variant=41294476902599 It’s...
  17. J

    Vents in the back of seats

    yup front of them is perforated. My wife says she feels air coming out of them, I never do but could be difference in clothes, seating position etc haha. Here’s a couple pics
  18. J

    Vents in the back of seats

    Yes it has the two heated settings and the third AC setting for the two front seats but the backs of them are solid leather
  19. J

    AFM/DOD Questions

    No dummy lights are on, but if a misfire I supposed a high end 2nd level scanner would be able to detect that. I’d have to take it to a shop for that. Not sure if that is the problem or if they just idle this way I think my ‘17 has the 2nd variation which is the “dynamic” system correct so most...
  20. J

    Anyone install a catch can kit on a 6.2L?

    Im still learning about mods/improvements to do on the 6.2s and was shocked to find this catch can mod. Would this be attributed to bad ring seals? If its a small amount at a time, couldnt you just vent the line down to the ground instead of a catch can? I do similar mods on Harleys and vent the...
  21. J

    AFM/DOD Questions

    I just bought a 2017 Yukon XL with the 6.2 and 170K miles. It seems to run good, has what seems to be a very subtle stumble or misfire type vibration at idle that Im not sure what is causing but my question here would be, is there a way to tell if the AFM/DOD program is still active or has...
  22. J

    Vents in the back of seats

    My wife and I were shopping for some time and looked at a bunch of yukon XLs in the 2015 - 2020 range before buying our 2017. One thing we noticed is a lot of the models we looked at before had vents molded in the back of the front seats but the '17 Denali we have now has smooth leather backed...
  23. J

    Looking to swap my bench for cpt chairs

    I have a 2017 Yukon XL and I’m looking to swap the bench seat 2nd row for captain chairs. the bench is black leather with heated seats and power folding options so the captain chairs would need to be the same. I’m in California
  24. J

    2nd row seats

    Yes you can change them but if you have options for heated seats you would need to swap for a bench with heated seats as well if you want to retain that feature. I’m not sure though if there is a difference in 2nd row seats between a regular and XL though. I’m looking to swap my black...
  25. J

    2017 Yukon Denali seat swap - my captains chairs for your bench

    I’m in the Bay Area California

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