during full flash on a lb7 duramax ecm something happend and didnt do it correctly and now truck has no start no crank and no communication with the ecm.. using the tech two i can gain access to all other modules on the can bus network except the ecm.. trying to read the ecm using the fs2 it says error $0281 ive also tried to reflash at the dealer using tis2web and using the tech2 passthru and also using the mdi wirelessly and they both throw an error in SPS for communication issue.
using scan and tune 8 it will not find the controller for ecm
using the flashscan and reading the tune it throws the code listed above.
every module in vehicle besides the tcm has a current u1000 dtc
just wondering if this ecm is a brick or not. and or if any suggestions on how to possibly get it to communicate again any help would be appreciated