Is the wiring harness different from a 1989 to 1991 camaro?

Yes, the wiring harness for a Camaro can differ between the 1989 and 1991 models due to changes in engine options, electrical systems, and features introduced in those years. While some components may be similar, modifications in wiring for things like fuel injection systems, sensors, and other electronic features can lead to differences. It's essential to consult specific service manuals or wiring diagrams for each model year to ensure compatibility.