Gas gauge backwards after Flash

[trlrider]

For example thinking any blue/green OS is fine to use in any vehicle that came with a blue/green box. That is not always the case.

Agreed! Recently cloned a pcm in a '05 Workhorse P42 with a 4.8. The A/C was not working prior to the cloning, so I did not think about it.
Oddly since the replacement pcm fixed a half dozen other issues the owner was having, he asked if we could fix the a/c!
My boss started the process thinking it was something like a low freon, bad pressure switch etc.! I got freed up from the other project I had and started digging and found the a/c compressor clutch relay was not getting a signal from the pcm.
Found out my boss had probed it and shot 12 volts where there should have been a ground signal, and promptly burned something up in the replacement pcm.
Anyway, found out in the research that the service number I originally used did not have the output for the a/c compressor clutch.
Went to the house, pulled out another spare that documentation showed did have the signal, and cloned it.
Put it in and replaced the fuse my boss fried and the a/c compressor started working.
Oddly, the 1st replacement pcm came out of a 2005 Suburban. Thus I do not understand why that service number did not have the compressor clutch signal at that pin!
Anyway, yes not all blue/greens are created equal.

[2xls1]

Agreed! Recently cloned a pcm in a '05 Workhorse P42 with a 4.8. The A/C was not working prior to the cloning, so I did not think about it.
Oddly since the replacement pcm fixed a half dozen other issues the owner was having, he asked if we could fix the a/c!
My boss started the process thinking it was something like a low freon, bad pressure switch etc.! I got freed up from the other project I had and started digging and found the a/c compressor clutch relay was not getting a signal from the pcm.
Found out my boss had probed it and shot 12 volts where there should have been a ground signal, and promptly burned something up in the replacement pcm.
Anyway, found out in the research that the service number I originally used did not have the output for the a/c compressor clutch.
Went to the house, pulled out another spare that documentation showed did have the signal, and cloned it.
Put it in and replaced the fuse my boss fried and the a/c compressor started working.
Oddly, the 1st replacement pcm came out of a 2005 Suburban. Thus I do not understand why that service number did not have the compressor clutch signal at that pin!
Anyway, yes not all blue/greens are created equal.

You are talking about hardware. I'm talking about using the 04 OS in vehicles that use a blue/green box that are not MY 04. It's the inability to see what that other MY OS is using vs what the 04 OS is using because of lack of XDFs.