* Year: The design of the steering column changed over the years. A column from a significantly earlier or later model year likely won't be a direct bolt-in replacement. Even within the 3rd generation (which your 1991 is part of), there could be subtle differences.
* Options: Features like tilt steering, cruise control, and airbag systems will affect the column's design and wiring harness. A column lacking a feature your car has, or vice-versa, won't be compatible.
* Automatic vs. Manual Transmission: While less common, there *might* be slight differences based on transmission type.
To ensure compatibility, you need a steering column from a very similar, if not identical, 1991 Camaro. Checking the part number is the most reliable way to confirm compatibility. Even then, you might need to transfer some components over.
