This Gates Radiator Cap Tester Adapter fits your 1978 1977 1976 1975 GMC P25 4.8L 5.7L L6 V8 and is perfect for a tune up or performance upgrade. .
Gates Radiator Cap Tester Adapter for 1976-1986 Pontiac Parisienne 3.8L 4.3L un
Gates Radiator Cap Tester Adapter for 1982-1995 Chevrolet Cavalier 1.8L 2.0L yq
Gates Radiator Cap Tester Adapter for 1983-1985 Mitsubishi Cordia 1.8L 2.0L xg
Gates Radiator Cap Tester Adapter for 1996-1999 Oldsmobile LSS 3.8L V6 - af
Gates Radiator Cap Tester Adapter for 1960-1965 GMC 2500 Series 3.8L 4.4L mt
Gates Radiator Cap Tester Adapter for 1963-1966 GMC Suburban 3.8L 4.1L 5.0L dg
