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I have searched for a TSB or anything about flashing the ECM and have not found anything. Does anyone have a number of solid info?
Thanks,
Jerry
 

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I entered my vin and it said I needed an update. So I'm sitting in the service dept right now waiting.


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Big difference in sound (even thought the lack of it in V4 still sucks) and more get up and go...i.e. hauls butt from 0 to 60 faster or 80 :D
she was jumping around 70 before in a fast start...would jump and belch but....:cool:
 

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So if it lists

12660065 00001B9F New software to address abrupt deceleration after an aborted shift.
12658729 00001162 Main Operating System

That means I need an update?
 

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I had my update today
Was it the same updates that I had listed? I am going to give my dealer a call tomorrow.

12660065 00001B9F New software to address abrupt deceleration after an aborted shift.
12658729 00001162 Main Operating System
 

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My VIN is 10566 built just before BG shutdown for the Holidays. Going into the website "https://tis2web.service.gm.com/tis2web" as suggested above I'm not sure I understand what I'm seeing for my VIN. It has about 23 different modules and probably submodules listed. On the first page that comes up, there is no mention of any updates required.....maybe that's good. When for example I select the Engine Control Module, it brings up Part numbers and descriptions that look like updates; but I can't tell if they have already been applied or are needed. Almost every module listed has some Part/Description listed.

Can anyone explain how I should be looking at this information and if I can tell if an update is needed......at least without going to a dealer first?
 

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my Vin was 11054 built the week before the Holiday shut down and I needed an update....you can call service and give them a VIN number...
 

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My VIN is 10566 built just before BG shutdown for the Holidays. Going into the website "https://tis2web.service.gm.com/tis2web" as suggested above I'm not sure I understand what I'm seeing for my VIN. It has about 23 different modules and probably submodules listed. On the first page that comes up, there is no mention of any updates required.....maybe that's good. When for example I select the Engine Control Module, it brings up Part numbers and descriptions that look like updates; but I can't tell if they have already been applied or are needed. Almost every module listed has some Part/Description listed.

Can anyone explain how I should be looking at this information and if I can tell if an update is needed......at least without going to a dealer first?
I found the same to be true when I tried out that site. I had the VIN of two C-7s to plug in (built several months apart) so I could see what the difference would be. There were differences, but it was difficult to really grasp what was what. As was posted, your dealer will be able to sort it all out.
 
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