1987 GMC R1500 Suburban Engine: 6.2L V8; 2 Bolt Bow-Tie gasket;. 1988 GMC R1500 Suburban Engine: 6.2L V8; 2 Bolt Bow-Tie gasket;. 1989 GMC R1500 Suburban Engine: 6.2L V8; 2 Bolt Bow-Tie gasket;. 1990 GMC R1500 Suburban Engine: 6.2L V8; 2 Bolt Bow-Tie gasket;.