Hello everyone I'm new user from Mi. I'm trying to learn how to reprogram a couple of 0411 ecm's . One for my 01 Sonoma crew with 4.3 for highway and towing . The other for an 01 s-10 with a 5.3 ls . I have HP tuner so I'll be begging for some advice in the future. I'm old school from way back. So this is new stuff for me. So glad to be able to join this Forum hopefully to get some advice and may to help someone .