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  1. Replies
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    In the two files in the first post, the tune file...

    In the two files in the first post, the tune file has MAF Fail High at 13,500, and the log file shows no current DTCs, both of which mean no SD mode.
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    MAF is NOT failed, log shows no current MAF DTC...

    MAF is NOT failed, log shows no current MAF DTC (P0103).
  3. More important than Service Number/OS...

    More important than Service Number/OS cross-compatibility is: A full flash really needs to be done with GM dealer-type tools. Doing a 'write entire' to change the complete operating system with HP...
  4. The folks who happily sold you this dual-TB...

    The folks who happily sold you this dual-TB abortion don't offer any support for it?
  5. The 0334 user manual sez it can be set for either...

    The 0334 user manual sez it can be set for either 11- or 29-bit and either 250 or 500kb, has that been changed in recent models?
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    That stuff is stored in the cluster itself, it's...

    That stuff is stored in the cluster itself, it's a programmable class2 device. For example, using GM tools and a TBSS VIN to reprogram an Envoy IPC gives the Envoy the 'Trailblazer SS' startup...
  7. OK, well, let me go buy a truck exactly like...

    OK, well, let me go buy a truck exactly like yours, I will change that setting and let you know if you should change those numbers in that little box. Does that work for you? Wouldn't want you to be...
  8. Do you think maybe having your 'On ECT' and 'On...

    Do you think maybe having your 'On ECT' and 'On Temp AC On' both set to 190* might make it act as you describe?
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    In my dealership daze, for a cranks-no-start I...

    In my dealership daze, for a cranks-no-start I would always want to see it run before seriously diagnosing anything. In the situation you've described - has spark, has injector pulse, plugs wet -...
  10. Yes, release & beta versions are allowed to...

    Yes, release & beta versions are allowed to coexist. No special steps needed for install, just use the defaults. Beta creates its own desktop/toolbar shortcuts.
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    12605716 or 12694768 (new number), couple feet...

    12605716 or 12694768 (new number), couple feet 1/4" coolant hose, 1/4" tee, a few clamps = less than $60

    You can only use the 'overflow tank' for the connection if it's the pressurized type, if...
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    For the rear, use the Gen4 truck front crossover...

    For the rear, use the Gen4 truck front crossover pipe on the rear ports. Run the new hose to a tee in the existing front hose.
  13. You need...

    You need "NDP472-KB4054530-x86-x64-AllOS-ENU.exe".

    MS page: https://support.microsoft.com/en-us/help/4054530/microsoft-net-framework-4-7-2-offline-installer-for-windows
  14. I have had two batteries do that "click = instant...

    I have had two batteries do that "click = instant zero volts open circuit" thing. Both were Optimas. Avoid them like the fking plague.
  15. There's a Midtronics PSC-550 on ebay right now...

    There's a Midtronics PSC-550 on ebay right now for ~$300. No need for that specific unit though, any generic power supply that puts out a fixed voltage (usually adjustable, within a limited range,...
  16. Even GM says: Please note that a "Midtronics...

    Even GM says:


    Please note that a "Midtronics PSC charger" is not a battery charger, in the Wal-Mart/Harbor Freight sense of the term.

    And, what HPT recommends against is not "having the lap...
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    Oh, it definitely could be something else, but...

    Oh, it definitely could be something else, but with the O2s in unknown condition you'll end up going round in circles. And it's time to replace them anyway.
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    How old are the sensors? They do wear out and go...

    How old are the sensors? They do wear out and go weird long before they go completely dead. The GM recommendation from memory is every 60K miles, they are probably still in OEM tolerances at that age...
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    Drilling is not a big deal if you need to reverse...

    Drilling is not a big deal if you need to reverse it later, just plug it with lead shot. If you put the hole in the right place you can simply squeeze the shot flat with pliers without removing the...
  20. Well, that doesn't work for me. Renaming the...

    Well, that doesn't work for me. Renaming the folder with either 4.4.2 or 4.4.4, after install, the Editor opens like normal but hangs when opening any tune file. Some registry hook is still looking...
  21. Nope. It deletes the folder containing the...

    Nope. It deletes the folder containing the previous version, without asking. I have watched it happen in the Explorer window during the install. Poof, gone.

    edit: And when I tried renaming the old...
  22. How? Installing 4.4.2 or 4.4.4 deletes any...

    How? Installing 4.4.2 or 4.4.4 deletes any previous installed versions when I try it, even if both the existing & new version are installed to non-default folders (i.e., 4.4.2 installed to 'HP...
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    Is this the same issue that screws up Gen3s when...

    Is this the same issue that screws up Gen3s when downstream O2s are deleted? Just curious, I see threads about that often, suggesting that disabling the cat test doesn't fully disable some part of...
  24. https://forum.hptuners.com/attachment.php?attachme...

    https://forum.hptuners.com/attachment.php?attachmentid=94564

    You're talking about archived copies of the downloaded installer, right?

    Is this some brilliant new "feature" they decided to try or...
  25. File is tuner locked.

    File is tuner locked.
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