For 1987-1991 GMC R3500 Radiator Cap Gates 72134WDXN 1988 1989 1990

For 1987-1991 GMC R3500 Radiator Cap Tester Adapter Gates 44621MCZD 1988 1989

For 1987-1991 GMC R3500 Radiator Cap Adapter 49927MTMJ 1988 1989 1990 Standard

For 1987-1989 GMC R2500 Radiator Cap Tester Adapter Gates 97749JRZZ 1988

MotoRad Radiator Cap Adapter for 1987-1991 GMC R3500 Engine Service Tools ce

Gates Radiator Cap Tester Adapter for 1987-1991 GMC R3500 4.8L 5.7L 6.2L uw

Gates Radiator Cap Tester Adapter for 1989-1991 Chevrolet R3500 5.7L 6.2L sm

For 1987-1989 GMC R2500 Radiator Cap Tester Adapter Gates 64561XQVG 1988