* Your Owner's Manual: Check the back of your owner's manual. It often has diagrams and troubleshooting sections.
* Online Repair Manuals: Sites like Chilton, Haynes, and Alldata offer repair manuals (often subscription-based) with detailed wiring diagrams. These are usually the most comprehensive resource.
* Online Forums: Searching on forums dedicated to Chevrolet Tahoes or GM vehicles (e.g., Chevrolet Forums, Tahoe specific forums) might yield a diagram posted by a member. However, always verify the information from multiple sources.
* Auto Parts Stores: Local auto parts stores (like AutoZone, Advance Auto Parts, O'Reilly Auto Parts) may have access to wiring diagrams through their computer systems. Sometimes they will print one out for you for free, other times they may require a purchase.
* Independent Mechanics: A local, independent mechanic might be able to provide you with a diagram or consult their repair manuals.
Important Note: The firing order is crucial for correct spark plug wire installation. The diagram you find *must* show the firing order, which is the sequence the spark plugs fire in. Getting this wrong can damage your engine. If you are unsure about the process, it's best to consult a qualified mechanic.
