So , OBD 2 scanner for chevrolet 5.3 l tahoe, Gm,BJ 2003, 213 KW !!Engine code “t“ What I know: I probably need J1850 VPW protocol on the scanner ! It probably runs out on an Actron device , or Memoscan U581 or Autoxray EZ 6000 ( All between 70€ – 250€ to have ) Autoxray unfortunately only from USA – Mist ! After using the search function I still have the following question ? If dan which Actron and ( Live data have they all or ( Actron I do not know exactly ) the other two Yes ) which it shows most codes thus also possibly transmission and not only engine control device codes and indeed IN GROAD FORM – not only as a pay code with lookup in iternet!!!!! – let me change a position ( zb ignition time – V-max lifting like predetor tuning device )! Or what kind of device in the above price range I would not know yet you would recommend ! ( No tech 2 -too expensive ) Since I am “halfway` well prepared on the topic as you see above I would e ine purely factual,technical consultation hope – no talk about meaning and purpose of an own OBD scanner or intervention in motor management etc.blabla bla … not meant bad only to relieve finger .. Thank you for all the experiences and tips of you !!!