The 91-96 Buick Roadmaster as well as the rest of the b-body (Impala ss Caprice Fleetwood) line have 5x5 bolt pattern same as 90's models 2 wheel drive tahoes and silverado pick ups
Five On five lug!
What is the lug bolt pattern on a 1952 Buick
What is the bolt pattern for a 1973 buick centurion
5 lug5 x 120.65mm Bolt Pattern
4.75
5x4.75
What is the lug nut pattern of a 1955 Buick Century? What interchanges with it?
5 lug on 5" centers (big bolt pattern for gm)
Disconnect the battery. Remove the alternator belt. Disconnect the wiring on the alternator, then unbolt and remove the unit. Bolt the new alternator in place and connect the wiring. Install the belt and connect the battery back up.
The bolt pattern is 5 x 4.5
1993-1996 bolt pattern 5x114.3 12 mm x1.5 hope this helps
5x115 mm