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  1. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Touché… I’m looking at the Tech2 now. Have any advice on a reputable site to purchase from? I see some knockoffs available, but don’t know which ones are good and which to avoid.
  2. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    I really appreciate you sharing your experience, sounds like a rough ordeal! I guess I’m glad I’m not the only one. I need to find a good diagnostic guy to help me out I believe. Thanks and have aMerry Christmas!
  3. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    It isn’t throwing any codes, none that show on a generic OBD-II scanner or on the dash anyway. I’ve taken it to a couple local shops and everyone sees that it has some mileage on it and says it’s time for a transmission rebuild/replacement. I just don’t buy that with the evidence I’ve found this...
  4. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    I know it was less than 10 miles once the lifter failed, and it failed all at once, no warnings or sounds catching my attention prior to the incident. I didn’t drive it at all, only started it a few times while diagnosing the problem. I’m trying to learn all I can about how these engines and...
  5. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Oh, and for the Service Learn Adapts, do I have to have a diagnostic tool to perform that learning procedure? Or could a man do it manually somehow?
  6. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Well out of pure frustration last night I went ahead and pulled the transmission pan, filter and TECHM/valve body assembly. I disassembled the valve body, hoping to find a shrunken check ball stuck in the separator plate, but no such luck. The check balls all looked fine and were the same size...
  7. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Battery tests good, I’ve got 12.7 VDC just sitting, 14.6 while running, passes the test on my digital battery tester. I took all the grounds off today, cleaned each and reinstalled, and can read 0.0 ohms from each ground connection back to the negative terminal (with batt disconnected). I pulled...
  8. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Thanks Dave, if a man were to drop the pan and pull the valve body assembly out, is there a kit you’d recommend, or I guess that would depend on what I found. I’m just trying to get my ducks in a row before I pull it apart to take a look. I’ve got limited experience with trans internals, and ive...
  9. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Thanks Tim, I didn’t have the ECM replaced, I just sent it off and had a guy tune it to turn off the DOD circuit. With this being the case, would you have to do all of the relearn stuff?
  10. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    So... the truck doesn't have any more warning lights and no check engine light, the engine is smooth, oil pressure and engine temp are right where I want them. I went for a short test drive yesterday just to see if perhaps something changed. With the fluids cold (ambient) the transmission...
  11. 2011DenaliInKY

    Dvd player ticking noise

    I have a 2011, and it did the same thing, right before it quit working altogether... I removed it, disassembled it, and found that one of the small ribbon cables had shorted out. Radio still works, just not the CD/DVD player
  12. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Thanks for the assistance, thus far! I really appreciate you guys taking the time to think my issue over and provide the help you have. I just find it so odd that I would have a failure such as this at the exact same time as the engine problem. The more I think about it, I feel like it has to...
  13. 2011DenaliInKY

    11' Denali - DOD survivor, but now transmission shot?!?!

    Howdy Everyone! This is my first post here, glad to see a group of people sharing knowledge! I've got a 2011 GMC Yukon Denali with the 6.2L and 6L80 transmission. I recently suffered a collapsed intake lifter on the #1 cylinder, but was able to get it freed up using a special tool I learned...

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