Do you have to do any modifying to a 2003 Cadillac CTS to fit 22 inch rims?

Yes, fitting 22-inch rims on a 2003 Cadillac CTS typically requires some modifications. You may need to adjust the wheel wells to prevent rubbing, potentially using spacers or modifying the suspension. Additionally, it's important to ensure that the overall tire diameter is appropriate to maintain proper speedometer readings and avoid affecting the vehicle's handling. Always consult a professional to ensure compatibility and safety.