So it's getting pretty annoying that I haven't figured out how to use the output and other diagnostic controls in the Scan Tool. I really need to get this working. The other day in a '10 Camaro SS I was connected through the E38 and was unable to control idle and was getting error messages in red (no reply / dvt error something like that). Then today, in an '09 Silverado 4.3 I was getting the same error messages attempting to do and idle re-learn or any other diagnostic control in ST for that matter. I was connected correctly, what gives????? Do I have to validate any modules or something? I didn't think so. Thanks!