No probs andy, known good starts should automatically switch of the TRAC anyway if the wheel rotation sensors are reading right, but yes I'll have a look. I've dug out that 7 series Autel ODB/ODB2 for you, never tested it on a GV [can't even REM what year I bought it] but I'll take it to our JIMBO's you try it and if it reads your car you can have it FOC anyway, it'll only get left in my box anyway ! I keep telling the group .. .. readers read & scan means generic, if it does not say diagnostics it does not do more than P/O-0-2-3-4 [note does not do P30 manufacturers] ODB2. Much better to bite-the-bullet Best of luck. http://www.totalcardiagnostics.com/images/obd2-codes-explanation.png