GM Body Style Codes Chart…

BUICK        
Buick A-Body   Buick C-Body   Buick H-Body
Model Years   Model Years   Model Years
Century 73-81   Electra 59-61   Skyhawk 75-80
Regal 73-81   Electra 225 59-84      
Skylark 64-72   Estate Wagon 71-76, 80-83      
Special 64-69   Limited 1958   Buick J-Body
      Roadmaster 53-58   Skyhawk 82-89
      Super 53-58      
Buick B-Body   Wildcat 65-68      
Centurion 71-73         Buick N-Body
Century 53-58         Skylark 87-97
Estate Wagon 1970, 77-85   Buick E-Body   Somerset 85-87
Invicta 59-63   Riviera 63-98      
LeSabre 59-85            
Riviera 77-78         Buick X-Body
Skylark 53-54   Buick G-Body   Apollo 73-75
Special 53-58   Regal 82-87   Skylark 75-85
Wildcat 63-66, 69-70            
               
            Buick Y-Body
            Skylark 62-63
            Special 61-63