I can't unlock my ECM. I have an 04.5 LLY Duramax and every time I try to unlock the ECM to copy my stock tune it gives me the "bootload error" I have tried about 10 times in a row with no luck.
I tried clicking on the "multiple keys" box and tried hooking the connectors and starting it up in the exact order the instructions say again no luck. I also just downloaded the latest version of 7.5 last night. So I don't think that is it.
What do I do????