LMM trans OS

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N2BRK

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Dec 31, 2009
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I did a buddy a favor recently and adjusted his TCM tune for larger tires. He has an LMM like mine. The only differences being he's a GMC and stock 17" wheels. While I was doing this, he mentioned that the dealer recently put in a TCM software update. I looked and sure enough, his software is different than mine and my other LMM buddy's.

My OS is 25836826 and level is cal level 8P6
His OS is 24256580 and level is cal level 8P7

I wasn't aware of any new update, so my question is whether I should be looking for an update for my truck or leave it the hell alone :roflmao:

FWIW I did SEARCH and found nothing on this.

Thanks in advance!
 
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N2BRK

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Dec 31, 2009
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ditto! I'm stumped, and there's nothing on the sites or google that I can find.
 
N

N2BRK

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don't know what to tell you. Here's his trans tune that I pulled.
 

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  • Chris G Allison stock_0000.ctz
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N

N2BRK

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Dec 31, 2009
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he had no issue and no complaint. When he was in for leaking tranny line warranty repair, they told him there there was a software update for his truck, and put it in.
 
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