Hey wiggs,
I would definitely say there is a short somewhere. Start with checking the rear and front parking light bulbs (especially the "double filament" turn/park/brake light bulbs) as some are prone to melt at the contacts inside the bulb sockets. If all are ok, older gm's headlight switches where prone to fail and short also. Hope this helps!
Chris
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Tuesday, December 5th, 2006 AT 5:26 PM