For 1988-1991 GMC R3500 Radiator Drain Petcock Dorman 68579FYTR 1989 1990

For 1989-1991 Chevrolet R3500 Radiator Drain Petcock Dorman 73649JPJJ 1990

For 1989-1991 Chevrolet R3500 Radiator Drain Petcock Dorman 85194HWTD 1990

For 1988-1991 GMC V3500 Radiator Drain Petcock Dorman 79464HRTX 1989 1990

For 1988-1999 GMC C1500 Radiator Drain Petcock Dorman 41372XMHH 1989 1990 1991

For 1988-1999 GMC K3500 Radiator Drain Petcock Dorman 61889ZZSY 1989 1990 1991

For 1988-1999 GMC C1500 Radiator Drain Petcock Dorman 41372XMHH 1989 1990 1991

For 1988-1999 GMC K2500 Radiator Drain Petcock Dorman 32486PMVP 1989 1990 1991