Hello together, for 3 months I have been proud owner of a GMC Vandura 2500 Bj. ’88 with a 5.7l TBI. Unfortunately I am still a bit bloody beginner in terms of US cars. But well – what is not, can still become… Now to my question: Can someone tell me which hardware and software I need to be able to read the control unit and possibly describe it? Thank you already in advance! LG Gonzo