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Had a g8 here today, ecm read and flashed no issues. Tried to read the t43 on the 6l80e trans and keep getting a x36 exceed number of attempts. Also had invalid seed/key error message. Is it possible to tuner lock this controller? Should i reflash with sps2? Ill post the "stock" ecm file from the car. Only mods were headers, cai and exhaust.
Still trying to figure out my issue. Does anybody know if it is safe to flash with a mdi? The car is currently running and driving.
Had a failed attempt at flashing with sps2. Got error e4492:cyber security access failure, e4423:unknown reprogramming error 5 at step 0. Now to replace tcm assembly. No idea why the ecm is unlocked.