1992 Buick Blower motor resistor location?

It would help if you told us what model Buick this is.

I am going to assume this is a Buick Car, FWD as the Roadmaster rarely kills a blower resistor.

For most common location, open hood and look near cowl for a plug near the air conditioning box just forward of the windshield wipers. It should have several wipers and the resistor itself protrudes downward into the box held in place with two screws. Screws have 7mm, 8mm, or 1/4 inch hex head.

If not: look near blower itself under the dash on the passenger side. The resistor should protrude upwards into the HVAC housing near the blower.