I just ordered hp tuners pro should have it tomorrow to start looking at it. I am going to plan to tune a 99 k3500 7.4 and a 55 belair with a 05 4.8 in and a 05 trailblazer 4.2 with some day. I would love to watch how to videos and read all I can on what the heck I am doing. The only tuning I have ever done is with a holley comander 950. So this will be a big learning curve for me, I am not sure if there is any does or don't I should be aware of. Also for a beginner were and what should I start reading.