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  1. J

    DFM disabler released

    This is my experience to the tee. You'll probably want to wait until you burn through a few tanks of gas before paying attention to gas mileage. I have developed a little lead foot since I installed mine. I will compare gas mileage when the newness wares off.
  2. J

    2023 yukon denali 6.2..what to do

    https://www.tahoeyukonforum.com/threads/dfm-disabler-released.150279/
  3. J

    2023 yukon denali 6.2..what to do

    Range RA007 DFM disabler
  4. J

    What did you do to your 21+ T1XX today?

    It's pretty straight forward to install. It sits between the ECM and the connector -- that's located inside the driver's side wheel well. It disables the autostop as well, so you'd likely just use this device and get rid of the other one. There's a discussion on this forum...
  5. J

    What did you do to your 21+ T1XX today?

    Two weeks ago ... installed GMC performance exhaust. Last week ... installed Range DFM disabler (RA007). Pretty happy with both. Exhaust doesn't center on the cutout in the rear, and stealership can't do anything. So I am going to take it by an exhaust shop tomorrow to see if they can...
  6. J

    DFM disabler released

    So I got the Range disabler yesterday and just put it in this afternoon. It was pretty straight forward. Put the Yukon on the highest suspension setting and turned the steering wheel all the way to the left. It provided just enough clearance for me to get back there without taking the tire...
  7. J

    DFM disabler released

    Thanks! Yeah, I have the air suspension on the Denali, so I will try and put it in service mode (highest setting) to see if I can get it done w/o removing the tire. Appreciate the help!
  8. J

    DFM disabler released

    A couple questions: 1. Does it disable DFM at very low speeds like at a stop sign? I was reading on an AT4 forum that DFM is enabled at very slow speeds with the RA007 device. 2. Were you able to do the install without removing the tire? This is me just being lazy :) Just ordered it from...
  9. J

    2021 RWD Denali Differential Service recommendations...

    Thanks fellas. Great info and much appreciated!
  10. J

    2021 RWD Denali Differential Service recommendations...

    Yeah, did that and double and triple checked -- doesn't mention a thing about differential. Have you read the manual?
  11. J

    2021 RWD Denali Differential Service recommendations...

    Is there a recommended service interval on the differential?
  12. J

    Premature tire wear

    I actually switched to the Pirelli's at 2,000 miles. I was able to sell the factory tires for a little more than what discount offered me. I have put 19,700 miles on those Pirelli's and they're already down to 5/32. I am going to put the Defenders on in a couple months.
  13. J

    Driving in L9 and DFM

    Looks like they'll never be a Range or Pulsar LT device for our rigs. Bummer.
  14. J

    The Just 2021's Pictures Thread

    Yes, you should be able to purchase it from them and either install it yourself and have them do it ...
  15. J

    Test drove the new Escalade today...

    Ask the dealer some direct questions about lifter failures in those motors and what GM has done to fix the issues.
  16. J

    Yukon Denali stranded me today ...

    Got it back today. They replaced the lifters on that side of the engine, couldn't get approval to replace the other side. They are working on extending the warranty. Really great dealership, I am just so annoyed with GM and their suppliers. GM needs to do a recall and replace all lifters...
  17. J

    Yukon Denali stranded me today ...

    I believe there is a TSB, but no recall.
  18. J

    2021 Yukon Denali---POS

    You need to read the link I sent and do some more learning. I am not going to argue this. DFM is not new to the 2021 model year, it was first introduced to the pickups in 2019, and then the SUV's in 2020. The lifter issues were supposedly determined to be in the July 2020 - October 2020 window.
  19. J

    Concerns with new generation Yukon

    I haven't asked. Good question for when I talk to them tomorrow. I do have a theory, however.
  20. J

    Concerns with new generation Yukon

    The service director has ordered the complete set of lifters, and he's working on approval to replace them all. If he isn't able to get that approval, then I intend to escalate the issue.
  21. J

    Concerns with new generation Yukon

    Update to this post -- had lifter failure at 5,070 miles while headed out on vacation.
  22. J

    Yukon Denali stranded me today ...

    Yes and yes. My guess is they found a new supplier for lifters for cost savings.
  23. J

    Nasty looking oil after 5200 miles of driving

    I just got my oil changed at 722 miles. Then I got the 5000 mile oil change at 4870 miles before we went on this trip where our lifters failed. I checked the oil before the oil change, and it looked clean like honey on the dip stick. Mobil 1 extended performance with regular wix filter...
  24. J

    Yukon Denali stranded me today ...

    Cylinder 2 lifters failed. Complete set for engine ordered. They're trying to get approval for replacing them all.
  25. J

    2021 Yukon Denali---POS

    DFM has been used since 2019 ... https://gmauthority.com/blog/gm/general-motors-technology/general-motors-propulsion-technology/general-motors-dynamic-fuel-management-cylinder-deactivation-technology/ Your date for December is also wrong, mine was built in Feb 2021. Thanks for trying.

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