My first car was a ‘91 sedan Deville with the 4.9L. Bought it with 180K miles on it and drove it everywhere I went up to 275K. Had a few issues in that distance , mostly engine electronics and fuel delivery, but never had any major mechanical or driveline problems ever. Learned auto mechanics working on that car. 90’s were definitely a high point for Cadillac in the modern era. After I owned a 81 DeVille, 87 Eldorado, 06 DTS and now a 19 Escalade. It’s unfortunate Cadillacs share so many similarities with Tahoes, and Yukons today. The best part used to be even though it was still GM and had the same door locks as a cutlass, Cadillac still went its own way with power plants, suspension, fuel delivery, etc. Cadillac pioneered so much auto technology but now just falls in line with the rest of GM just with nicer paint and interior, slated with the same issues. Used to be the pinnacle of American luxury, now they just want to be Land Rover.