Ron I have no answer to your question and suppose someone here or at the Grand Banks owner forum may have it. However I would just call my local Grand Banks dealer and ask as I'm absolutely certain they would know or at least be able to find out really quickly. I'll admit to being a little spoiled as Oceanic Yachts(my local GB dealer) has a satellite office in my home marina.
Straight to the horses mouth is the best approach for me.
It's easier to fool people than to convince them that they've been fooled - Mark Twain