* Your Owner's Manual: Check your owner's manual. While it might not have a detailed diagram, it could have a section on emission controls or vacuum system components that might offer some clues.
* Repair Manuals: Repair manuals like those from Haynes or Chilton are your best bet. They usually contain detailed diagrams and explanations of the vacuum system. Look for one specifically for your year and engine. These are often available at auto parts stores or online retailers.
* Online Forums: Search on automotive forums like Chevrolet forums (e.g., tahoeyukonforum.com or others dedicated to Chevy trucks and SUVs). Someone might have posted a diagram or have experience with your specific problem. Be sure to be specific in your search, mentioning the year, engine size, and what you're trying to accomplish (e.g., "1999 Chevy Tahoe 5.7L vacuum diagram for brake booster").
* Professional Automotive Repair Shops: A local mechanic specializing in General Motors vehicles may have access to the diagram through their repair software. They might be willing to give you a peek for a small fee.
Important Considerations:
* Accuracy: Always double-check any diagram you find against your vehicle's actual components. Vacuum lines can be easily misidentified or damaged, so careful comparison is crucial.
* Safety: Working with a vacuum system requires careful attention. Incorrect hookups can lead to poor engine performance or even safety hazards. If you're not comfortable working on your vehicle's vacuum system, it's best to seek professional help.
Remember to specify "1999 Chevy Tahoe 5.7L" in your searches to get the most relevant results. Good luck!
