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Old 04-24-2019, 06:43 AM   #31
SkiPopeye36
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Luckily we just found (2) used 05 ECU’s from the below guy. I’m grabbing one to put away for a rainy day should I ever need one. I’m not taking the chance of not being able to find an 05 ECU in the future and wind up having to part my damn car out:

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Old 04-24-2019, 06:52 AM   #32
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Lol
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Old 04-24-2019, 07:24 AM   #33
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I already have a GMP CGM diecast in my office. I don't need a 1:1 scale version in my garage someday...
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Old 04-24-2019, 01:18 PM   #34
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I've thought about that too since I have so many other parts stashed away already, but if you buy a spare ECU or BCM and tuck them away, then 10 years from now you need it only to find out the spare is a brick. Is there any way to test that it is viable before buying it to sit on a shelf? I'm hopeful the rebuild/repair/reprogram places will still be around for the foreseeable future.
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Old 04-24-2019, 04:49 PM   #35
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I swapped out my faulty BCM recently and plan on sending my original BCM in for rebuild this year before that service is gone. I guess I should do the same with the ECU. Then stash them for down the road.
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Old 04-24-2019, 05:50 PM   #36
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Quote:
Originally Posted by Rich-Tripower...View Post
I've thought about that too since I have so many other parts stashed away already, but if you buy a spare ECU or BCM and tuck them away, then 10 years from now you need it only to find out the spare is a brick. Is there any way to test that it is viable before buying it to sit on a shelf? I'm hopeful the rebuild/repair/reprogram places will still be around for the foreseeable future.

I'm about to make my own bench harness.

EFI live has a pdf on how to make one.
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Old 04-25-2019, 02:02 AM   #37
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Quote:
Originally Posted by Rich-Tripower...View Post
I've thought about that too since I have so many other parts stashed away already, but if you buy a spare ECU or BCM and tuck them away, then 10 years from now you need it only to find out the spare is a brick. Is there any way to test that it is viable before buying it to sit on a shelf? I'm hopeful the rebuild/repair/reprogram places will still be around for the foreseeable future.

There in lies the problem: having it fully tested before you buy it. The only 05ís you can buy fully tested are $800-$1000 from sellers on eBay. Iíll take my chance on the $200 plus shipping this one will cost me that was pulled from a wrecked GTO.

That said, 04ís and 06ís are still readily available as refurbished and tested units for reasonable prices (under $300 I believe). Us 05 guys are the ones currently having a hard time.
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Old 04-25-2019, 09:14 AM   #38
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Quote:
Originally Posted by JSRacing...View Post
Then stash them for down the road.

I have my spares. Never know WTF happens with GTO electronics. I do need a ignition switch spare though.
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Old 04-25-2019, 09:55 AM   #39
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Quote:
Originally Posted by LFSADRG...View Post

Also, cant flash an ECU back to stock that has a custom OS on it like the HPT 2 Bar OS.
Ching Chong TechII and 3 day subscription to ACDelco TDS can program the ECU.

This is not true. I flashed mine back to stock when i had a custom OS. You use hp tuners, use an original stock file and do a complete write.
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Old 04-25-2019, 10:54 AM   #40
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Originally Posted by Kfxguy...View Post
This is not true. I flashed mine back to stock when i had a custom OS. You use hp tuners, use an original stock file and do a complete write.

Yeah, that makes sense.
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Old 05-03-2019, 12:15 AM   #41
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So, fiddled around with GM's TIS service.

The slave OS for the 05 and 06 ECM's are also different, not just the main OS.

seems that difference is per service number as well, as far as i've looked.

that being said, hptuners does not read/write the slave OS to an E40, AFAIK. it writes pretty much every other segment, though. So, wiring an 05 compatible main OS to an 06 ECM would cause a mismatch with the two segments.

mebbe dats what cauzes a brickz?

who knows.
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