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**THI** · 03-05-2024, 03:17 PM

I do not have the diagram to either one, but keep in mind there were a Light-Duty version (7200 GVW) and a Heavy-Duty version (8600GVW). A lot more wiring on the LD version.

03-05-2024, 03:17 PM	#3
THI Active Member Join Date: Jan 2017 Location: Traverse City, MI Posts: 171	Re: 85 GMC C25 Questions I do not have the diagram to either one, but keep in mind there were a Light-Duty version (7200 GVW) and a Heavy-Duty version (8600GVW). A lot more wiring on the LD version.