The wiring harness that runs from the computer to the engine in my high mileage Ty has become chafed and some of the insulation worn through and shorting. My mechanic says that I need a new one, as this one is too brittle from heat and age to repair. Is this harness a specific application for the Ty alone, or is it a more generic piece common to Jimmys? Is it available from GM or elsewhere? Thanks for any help and have a safe, happy new year!