Gates 33602 Engine Coolant Thermostat Seal. NAPA Belts/Hose 33602. Engine Coolant Thermostat Seal. Fits what vehicles: 1972-1974 Peterbilt 200, 1981-1985 GMC Brigadier. Type: Thermostat Seal. Gates Green Stripe Heavy-Duty Thermostat Seals fit securely around the thermostat valve to prevent leakage.
