Recent content by Jay P Wy

  1. J

    23 Tahoe High Country drivers side mirror got wacked, only broke the glass.

    Rock auto sells the mirror glass so it must come off. A quick search didn't come up with any videos. If yours is already broken, finish breaking and figure out how it attaches. Older models you just pried the glass up. Edit -> There will be wires for the heat, turn signal and dimmer attached to...
  2. J

    GM to stop sharing data with LexisNexis and insurers

    True, the only thing that might be better is the Onstar cell phone is higher powered and has a better antenna so it may work where a smart phone won't. I tried the Onstar in my 2008 Avalanche and did get the unable to connect message.
  3. J

    Buyer Beware - Don't Buy a Yukon

    We our on our 2nd 3.0l diesel and no issues with either one. 1st was a 2021 Silverado and current is 23 Tahoe. One thing to consider is the diesel doesn't have AFM/DFM so lifter issues experienced with the 5.3l and 6.2l don't exist. It does have the auto stop/start that can be disabled. Also the...
  4. J

    2021 Tahoe Chirp When Downshifting to a Stop

    That makes sense. I haven't had a DFM truck since my 19 Sierra and it did some odd things until I got the DFM disabled. Unfortunately most the DFM disable stuff for the Silverado/Sierra won't work on the SUVs. Driving in L9 is the only option at the moment. I think you can get a tune to disable...
  5. J

    2021 Tahoe Chirp When Downshifting to a Stop

    You need to take the service person/mechanic for a ride and so they can hear what you hear. Is it possibly a tire chirp when down shifting? If it is getting the transmission into fast learn mode may fix it (it will relearn your driving style). You could also try driving in tow/haul to see if...
  6. J

    DEF level sensor issue

    There is a TSB for this. From GM Trucks dot com -> Attention diesel GM truck and SUV owners! General Motors has released a crucial service bulletin addressing specific issues related to the Malfunction Indicator Lamp (MIL) and Diesel Exhaust Fluid (DEF) level sensor. If you are driving any of...
  7. J

    What's Wrong With Your Yukon/Tahoe Today? ...And How Long Has This Been Happening?

    No issues with our Tahoe, but had an issue like this in my 21 Silverado. It turned out the spare tire wasn't tight against the frame and was moving around at times. Tahoe/Yukons have the same type of spare tire carrier that the pickups have. I haven't looked for the access to the winch to...
  8. J

    Beware: GM Nightmare - Defective 2024 and 2022 Yukon Diesel

    I totally understand your pain. Not trying to blame you at all. Diesels are a totally different animal to work on than a gas engine is. If a mechanic doesn't understand what all the electronic sensors do and how they interact with each other, the engine itself and the ECM/PCM they are going to...
  9. J

    Beware: GM Nightmare - Defective 2024 and 2022 Yukon Diesel

    That's all well and good but if the mechanic doesn't understand and isn't giving the engineers the correct info then the answer they are getting back is useless (trouble codes alone are not accurate info). Your 22 may have been a lemon but the 24 hasn't risen to that level yet. All problems are...
  10. J

    Beware: GM Nightmare - Defective 2024 and 2022 Yukon Diesel

    I'm on my 2nd 3.0l diesel and no issues with either one. I think you have had some bad luck and more important a bad dealer service dept. Find a dealer that has a good diesel mechanic.
  11. J

    High Rpms in Park

    GM Authority has learned that the 3.0L Duramax LM2 will utilize GM’s advanced cooling strategy known as Active Thermal Management. Initially implemented on GM’s turbo-charged 2.7L L3B and 2.0L LSY four-cylinder gasoline engines, Active Thermal Management uses a rotary valve system to distribute...
  12. J

    High Rpms in Park

    The 3.0l diesel doesn't have a thermostat. Temp is controlled by the ECM with valves and an electric pump.
  13. J

    Sign in ?

    I have had this in the past. To fix it I logged in on my computer and changed the password and then entered the new password in the vehicle and no more issues.
  14. J

    Here's a new one - transmission

    Were you in Tow/Haul mode? Shift points are determined by throttle/pedal position and speed. If you look at the shift tables for a modern transmission in EFILive or HP Tuners the speed at which the shift happens goes up the more the pedal is pushed down (both tow/haul and normal mode). Tow haul...
  15. J

    Synthetic diesel oil

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