Gates Engine Coolant Thermostat P/N:34928
Keep coolant flowing at the right temperature with the Gates Engine Coolant Thermostat 33939, an integrated-housing thermostat that opens and closes to regulate coolant flow and help the engine reach and hold its normal operating temperature. It's a direct-fit replacement for many vehicles, among them the 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy and 2002-2006 Chevrolet Trailblazer EXT — see the "Vehicles it fits" section for the full list and engine-level fitment.
Signs the original thermostat may need replacing include overheating, an engine that runs cool or takes too long to warm up, erratic temperature-gauge readings, or coolant leaking at the housing. If a stuck or failed thermostat is the cause, this assembly replaces it.
Interchange: 15-11006 · 902-2131 · 902-2800 · 413-160 · 413-192
1511006 · 9022131 · 9022800 · 413160 · 413192 · 31489 · 14659 · 85934 · 12572988 · 12602913 · 12620112 · 426190 · 61392
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What does this thermostat do?
It regulates coolant flow based on engine temperature, staying closed until the engine warms up and then opening to let coolant circulate, helping the engine reach and hold its normal operating temperature.
What's included with part 33939?
It's an all-in-one, bolt-on assembly that includes everything needed for a complete job: the thermostat, insert, seal and integrated housing.
Will this fit my vehicle?
It fits many vehicles, among them the 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy and 2002-2006 Chevrolet Trailblazer EXT. Check the "Vehicles it fits" section to confirm your vehicle.
What are signs my thermostat has failed?
Common signs include overheating, an engine that runs cool or warms up slowly, erratic temperature-gauge readings, or coolant leaking at the housing. Diagnose the cause before replacing.
Does it meet OE standards?
Yes. Gates states this unit meets or exceeds OE standards for fit, form and performance, with precision temperature regulation including application-specific adaptive MAP-control.
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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.