Hy Osnabruck, as Achipmunk said a little more info might help, is your truck identified as a Chevrolet, or a GMC. It is my understanding that a lot of chassis/trucks that were manufactured in Oshawa Ontario, Canada made there way down to Australia and New Zealand. I did do a quick check on the numbers that you posted, but there was one too many letters to make sense of them, and the number code might be GMC rather than Chevrolet. Is there a Holden plate anywhere on your truck?