Keep coolant flowing at the right temperature with the Gates Premium Engine Coolant Thermostat 33019S. It drops in as a direct-fit replacement for many vehicles, among them the 1999 Chevrolet Silverado 1500 V6-4.3L, 1999 Chevrolet Tahoe V8-5.7L and 1999 Chevrolet Astro V6-4.3L. See the Buyer's Guide tab for the full list.
This is an OE-improved thermostat with a start-to-open temperature of 195°F (91°C) and a bottom by-pass design.
Well-suited for severe-duty and high-performance applications. Country of origin: China. No installation tool is included.
Interchange: 2065-195
2065195 · 60909 · 540095 · 34909 · 45119 · 59119 · 65119 · 307135720
This part cross-references / interchanges with the following part numbers:
What is the start-to-open temperature of this thermostat?
The Gates 33019S begins to open at 195°F (91°C), regulating coolant flow to help the engine reach and hold its normal operating temperature.
What is this thermostat made of?
It features a heavy-gauge stainless steel construction for improved corrosion resistance, along with an upgraded spring for increased temperature stability under normal operating conditions.
Does it include a seal?
Yes. It comes with one rubber O-ring seal and a jiggle pin for air venting, which help make it equivalent to the original equipment part. No installation tool is included.
Will this fit my vehicle?
It fits many vehicles, among them the 1999 Chevrolet Silverado 1500 V6-4.3L, 1999 Chevrolet Tahoe V8-5.7L and 1999 Chevrolet Astro V6-4.3L. Check the Buyer's Guide tab to confirm your exact year, model and engine.
What are signs a thermostat may need replacing?
Common signs include engine overheating, a temperature gauge that stays low or swings erratically, poor heater output, or coolant leaks. Diagnose the cause before replacing.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
