This MotoRad Engine Coolant Thermostat fits your 1978 1977 1976 1975 GMC C35 4.1L 4.8L 5.0L 5.7L 6.6L 7.4L L6 V8 and is perfect for a tune up or performance upgrade. .
MotoRad Coolant Thermostat for 1962-1967 Chevrolet P30 Series 3.8L 4.1L 4.6L am
MotoRad Coolant Thermostat for 1968-1974 Chevrolet P30 Van 4.1L 4.8L 5.0L ck
MotoRad Coolant Thermostat for 1986-1994 Lincoln Continental 3.8L 5.0L V6 V8 od
MotoRad Coolant Thermostat for 1975-1996 Ford E-250 Econoline 4.9L 5.0L 5.8L tb
MotoRad Engine Coolant Thermostat for 1993-2002 Mercury Villager Cooling ha
MotoRad Engine Coolant Thermostat for 1987-1991 GMC R1500 Suburban Cooling fb