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Discussion Starter · #1 ·
Driving today and got “service stabilitrak”. Truck will not shift out of 3rd. Checked codes on my CTS and it shows a U0101 “Lost comms with TCM”.
 

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Discussion Starter · #3 ·
Yeah I’ve read about all the TCM failures on early LML. Started the truck this morning and all was well. Shifted normal. Cleared the CEL and got ~5mi down the road before it did it again. Thinking once the TCM gets hot it craps out. Got it unplugged and cooling off now.

Short of a stealership visit I hear you can buy pre-programmed TCMs online. Anyone go that route?
 

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Discussion Starter · #5 ·
Bought a new pre-programmed TCM from Dans Diesel Performance. Pretty much the price of a new iPhone which is crazy... Still cheaper than a stealership visit. Should have it by early next week
 
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