Went to flash my Stock tune back in and it tossed some trans controller codes at me, tried again and same thing. Tossed the tune I had back in now it keeps saying Failed. Truck does not run now. What do I start with? 2004.5 Duramax LLY
Anyone? Turn the key and there is nothing, I assume the device is not unloading the full tune or something OR I had a bad read on my stock tune maybe?
did you pull tbc batt, tbc ign 1, radio amp, radio, and info fuses? if not pull those fuses and try again. they are found in the underhood fuse block.
Looking at my Factory Tune I am a bit scared, it doesn't have any trans data in it, worried not pulling those fuses may of caused a bad initial read?
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