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Have a 2011 silverado 2500 Duramax LML in for service, Connected the MPVI2 to the car and for DTC reading. And like to flash it with some upgrades. But when I readed the DTC`s I got U0100, U0101 and U0140. Tried to reset, but comes back emideatly. And now the car won`t start or turn over. Do anyone have the same issue? Is there some solution for this problem?
11's are a write only ecm. When you 'read' the truck, it takes the vin and HPT populates a stock file for you. as for the errors though, no clue why on that front. And if it wont turn over, just from the read, i feel like you got something else going on. Thats a communications error. Check fuses etc.
Those year of truck are common for can bus issues.
Start by checking can bus wiring near the terminating resistor at the back of the truck near spar tire. If you do a search on google of lml can bus issues, you?ll get some good info.