I recently bought a 1982 GMC K1500 4x4 that I'm looking to restore. The truck body is in great shape but some of the mechanicals need work. I want to make it a daily driver, not a show truck.
I'm confused as to where to find part numbers for various parts. I've worked mostly on BMW cars before. Whenever I needed a part for a BMW, I would go to realoem.com, find the diagram and see the part number. Then I would order the part from any number of online retailers like ECS Tuning, FCP Euro, etc. Is there something similar to realoem for GM vehicles?
To make this more specific, I need a new coolant overflow tank. The current one has been replaced with a milk jug which I don't like very much.
I'm also interested in knowing whether GM produces a particular part. I always prefer to get OEM parts over aftermarket so I'd like to know if, for example, they still make that overflow tank. Other than calling the dealership, is there a good way to know?