This MotoRad Engine Coolant Thermostat fits your 1966 1965 GMC I2500 3.8L 4.1L L6 and is perfect for a tune up or performance upgrade. .
MotoRad Coolant Thermostat for 2001-2006 Chevrolet Suburban 2500 8.1L V8 - ww
MotoRad Coolant Thermostat for 2001-2006 GMC Sierra 3500 8.1L V8 - Cooling pf
MotoRad Coolant Thermostat for 1970-1974 Chevrolet G30 Van 4.1L 4.8L 5.7L nq
MotoRad Coolant Thermostat for 1988-1996 GMC K1500 6.2L 6.5L V8 - Cooling fy
MotoRad Coolant Thermostat for 1975-1978 GMC K25 4.1L 4.8L 5.0L 5.7L 6.6L an
MotoRad Coolant Thermostat for 1984-1993 Jeep Grand Wagoneer 4.2L 4.6L 5.2L pq
