Here is a listing of commonly used GM wire colours and their purpose. I found this in another forum and credit is given to the poster in this link.
As far as the Black/White wire colours used in the GMC house DC circuits, I always check the polarity when connecting any polarity sensitive device.
http://www.gmcmhphotos.com/photos/misc/p66346-gm-wiring-colours.html
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Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
As far as the Black/White wire colours used in the GMC house DC circuits, I always check the polarity when connecting any polarity sensitive device.
http://www.gmcmhphotos.com/photos/misc/p66346-gm-wiring-colours.html
--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that