This is confusing to me because on the internet somewhere it says that it was mandatory for all cars in Australia to become OBDII compliant from 2001, but this is what I'm finding out :- VT series 1 , 5 litre V8 - OBDI (1997 - 2000) VT series 1 - VY series II ,ECOTEC V6 , OBDI (1997- 2004) VT series 2 - VE series II ,LS1,LS2,LS3 - 5.7,6.0,6.3 litre V8 OBDII (2000-2012) VZ series 1 - VE series II, Alloytec V6 3.0, 3.6 litre engines OBDII (2004- 2012) This is a trap I fell into when trying to find a scan tool to reset an SRS airbag fault on my VY SS Commodore, Autel make the Maxidiag DS708 which works on OBDII compliant Commodores but costs an arm & a leg, like over $2000 at the cheapest. The GM tech 2 does all the Holdens from the VN Commodore onwards I think and maybe the VL Walkinshaw so I'm going to try and get that for the future. I thought I'd better write up this list so no one else falls into the same trap, at least I was able to fix that up but at a small cost.

all ls1s comodores are actually obd 1.5 you find the engin management is readable in obd 2 but it used obd1 protocol for codes dont quote me but i believe the system was called aldl

i work for holden mate vn-vs is obd1 vt onwards is obd2 and all are later model stuff is using gds2 which is now online the gm website with a product called candi