deville driver seat

please help the driver seat on my 99 deville will not move forward to get too the two rear bolts. have put voltage to the motor it runs but no movment. what would be my next move? thanks

If you can raise the seat cushion to its full height, you may be able to access the motor and coupling and manually rotate the motor to move the seat forward. It will be slow going, but can get you there.

Aside from that, you can remove the seat switches and manually apply power, observing the polarity closely.