ok guys i have recently bought an 01 lb7, and i have done some playing with efi live when i first got it for my lly. i tried to pull the stock file out of the lb7 i bought and it says bootloader rejected. reason: efilive could not unlock ecm. is there any way around this? the truck does not feel like it has a tune on it. also, im getting a bunch of engine codes from the transmission and powertrain controller. never had any issues with my lly as far as check engine light goes so i guess you could say im new to that portion of it. if they are engine codes shouldnt it come from the engine ecm?
LB7: bootloader rejected?
- Thread starter dirty_max
- Start date
Bumping this up, I'm getting the same problem... Bootloader rejected. I have tried alt keys, un checking high speed. Uninstalled efi 7.5 and loaded current version, updated boot lock and firmware on the V2, tried flashing in V8 same issue... WTF? I have tuned this truck many times... Only thing unknown is it has a new owner?
