Grigg,
I've been in discussion with a company in the U.S. that's working on a wiring harness for the Duramax. It'll need 12v positive and negative from the batteries (to the starter), plus 12v constant and switched power. That's all.
It's supposed to work with the LBZ and LLY models to start with, expanding to the LB7 and LMM as demand warrants it. They are still in the testing phase, but introduction is planned for the first quarter of 2008.
Lane
