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  1. W

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Got it. Have you ever used the pass through stuff on the Tech 2? I haven’t bothered to dig my old laptop out and get that stuff working. I wonder if there is anything published by Cali on what they actually are going to compare when they perform the test?
  2. W

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    I don’t think the “system” has a way of knowing, as long as all the subordinate systems are all in synch. As Chris mentioned, I can take my ECU out, send it to a tuner, have AFM turned off and reflashed and install it without any other issues. Maybe just reflash the stock image for the smog test?
  3. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    I believe it is right at the lift gate motor (the control module is on top of the motor, I think, and the harness plugs into the module right there). It really seems like he is going to need a Tech 2 (or other professional scan tool) to get it sorted.
  4. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    I believe people are told to disconnect the negative to reduce the chance of sparks, shorts, etc. while disconnecting. From a DC theory point of view, you need both sides to make a circuit. Do you have a liftgate power switch on the console? And if so, have you tried turning it off?
  5. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    Another thing to try would be if you have a liftgate switch on your console , flip that switch off, maybe the PCM won’t check the liftgate status with it off.
  6. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    What it has sounded like from the beginning is when you connected the actuator and it was running, you disconnected power and the state the module that was calling for the lift gate actuator to run was left in that state. That state may be incompatible with starting the truck, TD or otherwise...
  7. W

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    It’s all top secret crypto stuff. Likely related to the anti triggered AI cloud stuff, you know, authentic gibberish… :)
  8. W

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    I worked for a company that had division that did contract work for the NSA among other departments in the Federal government. It was mainly crypto stuff. They were walled off from the areas I worked, had separate entrances with and special security. Occasionally I would have to have a meeting...
  9. W

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Geez, I never had an invisible message, sounds kind of top secret. :) Probably have to bounce it off the computers at the NSA, I heard we are on heighten alert now.
  10. W

    08 Tahoe lower ball joint removal help!!

    Good to know, thanks for getting back to me.
  11. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    I agree. The lift gate logic is tied into the whole "do we let him start this thing up" code. It might be something as simple as resetting that module (or the BCM) so it says everything is jake with the lift gate... A Tech 2 would be invaluable in this circumstance. Edit: Maybe check the...
  12. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    So make it 13 minutes between off/on/start cycles. Or maybe try in succession the procedures documented in the first 19 YouTube videos that address similar problems. Without a high end two way scan tool, it is going to be a kind of blind man’s bluff thing. It is possible it isn’t even a theft...
  13. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    I understand your security light is not on. You told me that before. What I am suggesting is something in your BCM/PCM is not happy and given you were screwing with components that talk to the BCM and interact with the Theft Deterrent system, perhaps a procedure that resets programming in...
  14. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    There are a ton of YouTube videos on ways guys got their Theft Deterrent system straightened out. The ones where guys stand on one foot holding their breathe I probably would skip. One constant in most I scanned was the battery needs to be kept charged, the tow guys all use jumpers during...
  15. W

    Replacement motor questions but hopefully fixable

    The good news is it had to come out, so it isn't work in vain. Occam would say there is a pretty high probability the lifter (and damage it did to the cam lobe) was causing your miss.
  16. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    I think when the theft deterrent system disables the truck, the power locks are disabled as well, at least that is the way I remember it. I have never had it happen to me, so am just going on what I have read.
  17. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    Yeah, I am just going from the shop manual which discusses lift gate control module programming, I frankly haven’t even been in that part of the Tech 2, so have no idea what “programming it” means.
  18. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    I have no idea. I assume there was no alarm, so maybe that lamp request wasn’t set. A generic ODB reader won’t get the body codes or be able to program the lift gate control module (if that needs to be programmed). Where do you live?
  19. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    Looking at my shop manual, you may have fouled up the theft deterrent system. I have not done any research into how to unstick that system. You might what to do some research on that system and how to reset it. It will inhibit starting. Edit: a brief scan of possible fixes to the theft...
  20. W

    07 Denali AWD to 2WD

    I think it is a bad idea. You aren't going to gain anywhere near enough mileage to offset the cost of conversion. In addition, you will have a truck that is worth a lot less than a 2WD, which is worth a lot less than an AWD Denali. ion things change and you need to sell it. You have a great...
  21. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    One thing I noticed in the shop manual is the power liftgate module is connected to the Theft Deterrent logic. You might check to see if you triggered the theft deterrent system. A tech 2 would be really helpful I suspect.
  22. W

    Unhooked Battery, now it won't start- Please help! *SOLVED*

    Do you have a Tech 2 (or near someone in the Tech 2 owners sticky)?
  23. W

    Motor Mounts - 2008 Chevy Tahoe Z71 4x4

    Great job describing your method and steps.
  24. W

    07 Chevy Tahoe

    Did you reset the DTC?
  25. W

    08 Tahoe lower ball joint removal help!!

    Did you restake the new one or did a new snap ring version fit?

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