* Repair Manuals: A factory service manual or a Haynes/Chilton repair manual specific to your 1997 Chevy 3500 van is your best bet. These manuals usually have detailed diagrams of the brake system, including the line routing. You can find these manuals online (eBay, Amazon) or at auto parts stores.
* Online Parts Catalogs: Websites like AutoZone, Advance Auto Parts, or Napa Auto Parts allow you to look up parts for your vehicle. While they might not have a complete diagram, the parts diagrams often show the relative location of components and how the lines connect. This can be helpful in piecing together the overall layout.
* Local Auto Parts Store: A knowledgeable parts counter person at a local auto parts store might have access to diagrams or schematics through their computer system or printed resources.
* Online Forums: Search Chevy van forums (e.g., forums dedicated to Chevy vans on sites like enthusiast forums or even general automotive forums). Someone may have posted a diagram or a picture of their brake system that could be helpful. Be sure to specify the exact model and configuration (e.g., 1-ton, chassis cab, etc.) as this greatly affects the brake system setup.
Important Note: Working on brake systems requires care and skill. If you're not experienced with brake repair, it's strongly recommended to take your van to a qualified mechanic. A faulty brake system is extremely dangerous. Even using a diagram, incorrect installation can lead to catastrophic brake failure.
