flashing issue truck has no vin after batteries die

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
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idaho
shop.dieselmafiaperformance.com
ok so I tuned my friends truck about 2 years ago never had a issue and he had his batteries die up in nd after getting new ones he said the truck wasn't running the same and had lop and his cts made him manually enter his vin before it would work which was odd so I told him bring it by I wanted to reflash it.

well when I went to flash it it said I needed a vin license which I have already licensed the truck. I was like wtf I read his truck and the vin was just symbols and dashes his calibration number was 33886413 which ive never seen before and the bcc was just dashes and ?? marks I had a screen shot but..... my laptop died charger wasn't plugged in like I thought:( but anyone ran into I tried flashing his old tune in with a new vin license still didn't take a vin told him to try a full flash from gm otherwise probably a new ecm??

security light is also on the dash im sure from not having a vin the truck also loops because its pulling mm to 1-0 non stop trying to kill it at idle it seems
 

Gone Nomad

On a Time Out
Sep 29, 2011
72
0
0
...it it said I needed a vin license which I have already licensed the truck.
If I'm not mistaken, an EFILive license is to the ECM, not the VIN, so if it was asking for that, that doesn't bode well for the ECM. If EFILive software stopped recognizing an ECM that previously had one of your Flashscan licenses associated with it, they'll probably make you buy a new license, although I think I did read somewhere that they have a recovery process (though I think you'd have to contact Cindy or Ross to see if they'll do it in your situation).
 

z71havinfun

New member
Mar 6, 2013
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I had the same issue with my lb7. Twice. They both lost the SN when I tried to flash. Needed up buying 2 different ECMs
 

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
k well full flash made the vin show up again and it stopped lopping put his old tune in and started again........ flashed to the stock file I had originally no lope???? so rebuild it off the stock file again flash lopes again mm commanded goes 1-2mm hits 0 then 1-2 at idle driving zero issues fuels fine drives fine but the love of god I don't understand what's going on at idle truck never did this on this tune before

its like a 80hp tune nothing big or fancy