LeSabre Custom - need to replace the lights above license plates but cannot acce

Disconnect the tail/back up lamp harness connector from the the body wiring harness. Remove the tail/back up lamp assembly from the trunk lid. While supporting the tail/back up lamp assembly, unplug the tail/back up lamp harness grommet from the rear compartment lid and remove the tail/back up lamp from the vehicle. Remove the fastener securing the license plate lamp assembly to the tail/backup lamp assembly. Remove the license plate lamp housing from the tail/backup lamp assembly.