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I have a new u7192 that will not save the original backup. It is giving me a -12 and the message that it can not do a packup if there is a performance tune already installed. I have tried doing it with all ass fuses removed. I talked to tech on the phone and they verified that the tuner is communicating with the computer then they suggested I take it and have the pcm flashed. I took it to the dealer and had the pcm flashed but I am still getting the same message when I try to backup

2006 hummer H2 6.0
u7192 rev 9r13

I am having this exact same problem on a late '06 with an 8.1.... anybody have an answer? The last time I had this much trouble with a customers vehicle was back in '03 or '04 on a duramax..............the washer fluid was low.

gtowagon wrote:I have a new u7192 that will not save the original backup. It is giving me a -12 and the message that it can not do a packup if there is a performance tune already installed. I have tried doing it with all ass fuses removed. I talked to tech on the phone and they verified that the tuner is communicating with the computer then they suggested I take it and have the pcm flashed. I took it to the dealer and had the pcm flashed but I am still getting the same message when I try to backup

2006 hummer H2 6.0
u7192 rev 9r13

Can you post your VIN so I can try this on the bench?

Deerediesel wrote:I am having this exact same problem on a late '06 with an 8.1.... anybody have an answer? The last time I had this much trouble with a customers vehicle was back in '03 or '04 on a duramax..............the washer fluid was low.

Any aftermarket electronics int he truck, stereo, etc?