* Model: C10, C20, C30 (different chassis and potential options)
* Engine: The engine (e.g., V6, small-block V8, big-block V8, diesel) drastically impacts the wiring.
* Options: Power windows, locks, air conditioning, cruise control, and other options all add to the complexity of the wiring.
* Body style: Regular cab, extended cab, crew cab.
To find a wiring diagram, you'll need to specify the exact details of your truck (model, engine, and options). Once you have that information, you have a few options:
* Chevrolet Service Manual: A factory service manual for your specific year, model, and engine will contain the most accurate and comprehensive wiring diagrams. These can be found online (eBay, Amazon) or through specialized automotive parts retailers.
* Online Resources: Websites like Haynes.com and Chilton.com often have repair manuals with wiring diagrams, but again, you need the precise details of your truck. Be aware that the quality and accuracy vary greatly on these sites. Some forums dedicated to classic Chevrolet trucks might also have helpful information.
* Local Auto Parts Store: Some auto parts stores might have access to wiring diagrams through their computer systems, but again, be prepared with all the details about your truck.
In short, you need to be very specific about your 1985 Chevy truck's configuration to find the correct wiring diagram. The more information you provide, the easier it will be to locate the appropriate diagram.
