BT DieselWorks - Duramax/Allison standalone wiring harness ***We are one of the most knowledgeable and prominent Duramax standalone wiring harness manufacturers in the industry. Our reputation and professional quality work speaks for itself. We have built harnesses for customers all over the world, as well as Brand: BT DieselworksCategory: Wiring Harnesses wiring harness installation time - Chevy Message Forum Feb 08, 2008There is the in-cab harness, the engine harness, the tail light harness and the parking light harness. You can replace all the harnesses in about half a day, if you know what you are doing. About a weekend if you are clueless. The in-cab harness will take the longest. An aftermarket harness should take about a weekend.
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