There isn't a single "ignition wire" color universally consistent across all 2004 Tahoes. The color coding varies depending on the specific component and location within the vehicle's wiring harness. You'll need a wiring diagram specific to your Tahoe's year, make, model, and engine to identify the correct wire(s) for the ignition system.
Instead of looking for a single color, you need to find the wire(s) that provide power to the ignition coil(s), ignition switch, or other ignition-related components. A wiring diagram, often found in a repair manual or online, will show you the correct wire colors and their locations.
