1. Repair Manual: A factory service manual or a Haynes/Chilton repair manual specifically for a 1998 Chevy Astro is your best bet. These manuals often include detailed diagrams of the braking system, including the brake lines. You can find these manuals online (eBay, Amazon) or at auto parts stores.
2. Online Parts Catalogs: Some online parts catalogs (like AutoZone, Advance Auto Parts, or RockAuto) may have diagrams available if you look up parts related to the brake system. While they may not be full system diagrams, they might show relevant sections. Search for things like "brake line," "brake hose," or specific component names. Be aware that these are generally focused on parts identification, not comprehensive system diagrams.
3. Chevrolet Dealer: A Chevrolet dealership's parts department might have access to diagrams from their service manuals or online systems. It's worth a call, but be prepared for a possible charge for their time.
4. Independent Mechanic: A local, experienced mechanic specializing in domestic vehicles might have access to diagrams or be able to create a rough sketch based on their knowledge.
Important Considerations:
* ABS System: If your Astro has Anti-lock Brakes (ABS), the brake line routing will be more complex. A diagram is even more crucial in this case.
* Diagram Accuracy: Remember that diagrams are representations. Slight variations may exist between individual vehicles due to manufacturing tolerances or modifications. Always visually confirm routing before undertaking any brake work.
* Safety First: Working on brake lines is dangerous. If you're not experienced with brake system repair, it's strongly recommended to take your vehicle to a qualified mechanic. A brake system failure can lead to serious accidents.
Start with the repair manual option; it's the most likely source of a complete and accurate diagram. If that doesn't work, try the other options listed above. Always prioritize safety when working on your vehicle's brakes.
