...alternator on a 2004 GMC Yukon Den? The alternator wire is no good and I need to replace it the diameter of the core is 1/8 of an inch.So that would make it 10 gauge.On the sheathing it is written"8.0. sq. mm.fusible link.The dealership wants 27.00 for a lousy 10 1/2 inch wire and that is ridiculous.