1999 Cadillac Seville Changing the cabin air filter under t

Look next to your gas pedal(to the right). Little white door that has a pull tab. Do you know what your getting into with this filter, It was not one of GM's better ideas. It is a three piece interlocking filter that can take 20 mins, or an hour and a half, it decides which one. We got 1.5 hours flat rate to replace a cabin filter on 98-04 Sevilles, and the 20 min time I referred to was my personal best. It helps somewhat if you remove the gas pedal from the firewall(couple of nuts). Good luck!