For 1987-1989 GMC R2500 Radiator Cap Adapter 49826XPNW 1988 Standard

For 1987-1989 GMC R2500 Radiator Cap Adapter 24331VDMY 1988 Standard

For 1987-1989 GMC R2500 Radiator Cap Gates 86112MCQG 1988

For 1987-1989 GMC R2500 Radiator Cap Gates 87646MGHR 1988

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

For 1987-1989 GMC R2500 Radiator Cap Gates 54571GBFW 1988

For 1987-1991 GMC R2500 Suburban Radiator Cap Gates 31826HBQQ 1988 1989 1990

Gates Radiator Cap Tester Adapter for 1987-1989 GMC R2500 4.3L 4.8L 5.0L sk