What color is the ignition wire on a 2000 s10 4.3?

There isn't a single, universally "ignition wire" color on a 2000 S10 4.3L. The color coding can vary depending on the specific wiring harness and even minor variations within the same year model. You'll need to consult a wiring diagram specific to your vehicle's year, make, model, and engine to determine the correct color.

To find the correct information:

* Repair Manual: A Haynes or Chilton repair manual for your specific vehicle will have detailed wiring diagrams. This is the most reliable method.

* Online Wiring Diagrams: Websites like AutoZone, Advance Auto Parts, and others sometimes have free access to wiring diagrams (you may need to enter your vehicle's details). However, the accuracy can be questionable, so use caution.

* Factory Service Manual: This is the most accurate source, but it's usually the most expensive.

Instead of looking for a single "ignition wire," you might be better off tracing the wires from the ignition switch or the ignition coil itself. This will lead you to the correct wires for your application, regardless of color.