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  1. S

    Overheating transmission

    2015 -Yukon XL Denali with 190k miles. Transmission overheated 2 days ago. Changed out the fluid and filter (overdue). Nothing remarkable on the magnet or in the fluid - just dirty. Just drove it after the change out and temp was 225-250 and rising in 25 min of driving. Am I just screwed into...
  2. S

    No gps signal

    My 2015 Yukon xl Denali has no gos signal - when you go to the built in map the system does not know where it is. Anyone fix that before?
  3. S

    Issues programming new key fobs

    I am trying to program new fobs and am having an issue. I follow the steps in the manual and get to the part where the DIC says “ready to program key #”. After I push the start/stop button nothing happens. The key is not programmed. I have done this before with no issue.
  4. S

    Exhaust system rattle

    I have a 2015 Yukon XL Denali that has a rattle under the center of the vehicle. Replaced the muffler, checked all of the heat shields. Comes in and out at certain RPM’s. Shop thinks it may be the mid-exhaust flex coupling (piece circled in red) but on the Denali’s it is welded into the...
  5. S

    Replacement ride height sensor

    I have a 2015 Yukon XL Denali with stock rear air suspension. I need to replace the right rear ride height sensor - 1. Any reason to use something other than stock AC Delco parts? 2. Does it make sense to replace both left and right rear sensors at the same time? Thanks.
  6. S

    2015 Yukon Denali XL Rear Shocks on backorder

    Have a 2015 Yukon XL Denali with Magride. Doing a delete of the front magride (have all parts in hand) but I also need to replace the right rear strut that went bad. OEM part (84176675) is on back order. What other options can I use for OEM and do I need to replace both rear struts at the same...
  7. S

    Engine rattle

    So I posted this before as a muffler rattle - but then I ruled that out after replacing the muffler so new thread. I get a rattle (which I thought was the muffler) with the symptom listed below. Ok. Back to drawing board on symptoms. Not speed dependent but appears to be rpm dependent...
  8. S

    2015 Yukon XL Denali with bad muffler

    Just found out I have a bad baffle plate in my muffler. Rattles like hell, makes me want to pull my hair out. 98k miles. Told that my extended warranty does not cover. $1000 to replace. Not interested in aftermarket. 1. Should this be covered by GMC’s power train warranty? 2. Is $1000...
  9. S

    Running board issues

    2015 Yukon XL Denali with retractable running boards - that aren’t always retracting. Under extended warranty so it will get fixed but curious how many experiencing it and what the fixes have been. *Yes I understand the ultimate fix to never have gotten them, the ole “if it moves it can break”...
  10. S

    Towing capacity

    So I’m sure this has been written about before but I am doing it again. I have a 2015 Yukon XL Denali with CAF and BB tune and towing package. Everything I read says GVWR is 7900 lbs with max total of 14000 lbs. I am looking at a travel trailer but the gvwr is 6900. By my math adding in...
  11. S

    Front Pads and Rotors for 2015 Yukon XL Denali

    Getting a squeal from the front front end at low speeds. I knew the pads were getting low so I figure now is the time to do the front brakes. What brands do you guys recommend for pads and rotors? Thanks. Sent from my iPhone using Tapatalk
  12. S

    Undrivable suspension

    2015 Yukon XL Denali 54k miles at the shop - told it is undrivable because the only suspension that is working is the tire sidewalls. I’m being told the front mag shocks are locked out and not compressing. I have made no modifications to the shocks. Has anyone seen this before or dealt with...
  13. S

    Transmission cooler for 2015 Yukon XL Denali

    Any recommended transmission coolers from the group? Had an issue while towing - among other things the transmission overheated while towing an RV. Thanks. Sent from my iPhone using Tapatalk
  14. S

    Keys locked in car

    So I just locked the keys to my 2015 Yukon XL in the car...while it was running. I didn't think it was supposed to be able to do that? Anyone else have this happen before? Sent from my iPhone using Tapatalk
  15. S

    Electronic Problems

    I am having two electrical issues with my 2015 Yukon XL Denali First - today the speedometer and tachometer stopped working on the instrument cluster. The HUD still registers speed but the needles on the dials stay at zero. I checked fuse #25 on the left fuse panel since it made the most sense...

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