* Repair Manuals: A Haynes or Chilton repair manual specifically for a 2000 Buick Century is your best bet. These manuals usually include detailed vacuum diagrams. You can find these at most auto parts stores or online retailers like Amazon.
* Online Automotive Repair Databases (Subscription-Based): Sites like AllDataDIY or Mitchell1 offer comprehensive repair information, including vacuum diagrams, but typically require a paid subscription. These are often used by professional mechanics.
* Your Local Auto Parts Store: Many auto parts stores (like AutoZone, Advance Auto Parts, or NAPA) can sometimes access diagrams through their computer systems, though this isn't guaranteed for older models. It's worth asking.
* Online Forums: Buick enthusiast forums might have someone who has scanned a vacuum diagram from their repair manual and shared it. Try searching for "2000 Buick Century vacuum diagram" on forums dedicated to Buick vehicles. (Be wary of the accuracy of information found on forums.)
Important Note: When searching online, always specify the engine size (3.1L or 3.8L) to ensure you get the correct diagram. The vacuum system can vary slightly depending on the engine.
