* Your Owner's Manual: This is the first place to check. While it might not have a full diagram, it may have some basic routing information or at least point you towards specific components.
* Repair Manual (Haynes or Chilton): These manuals are readily available online and in auto parts stores. They typically have detailed diagrams and explanations of the vacuum system. Make sure you get one specific to your year and engine.
* Online Resources: Websites like AutoZone, Advance Auto Parts, and NAPA Auto Parts often have online diagrams and parts catalogs. You'll need to enter your vehicle's year, make, model, and engine to get the correct information. Sometimes you need to create an account to access these diagrams.
* Chevrolet's Website: While less likely to have a full diagram, Chevrolet's website (or a dealer) might offer some service information if you have the VIN (Vehicle Identification Number).
* Forums: Search online forums dedicated to Chevy S10 trucks (e.g., S10forum.com). Members often post pictures and diagrams, and you can ask for help identifying specific hoses.
Important Note: When searching, *always specify the year, engine size (e.g., 2.8L, 4.3L), and potentially the engine code* to ensure you get the correct diagram. The vacuum system can vary significantly between different engine options and model years.
