Four Seasons 37866 switch for the 2002-2005 Chevrolet Trailblazer and other vehicles senses engine coolant temperature. It is also listed as a coolant temp sensor switch.
- Engineered and tested for trouble-free operation, with over 50 years of mobile A/C experience behind Four Seasons parts
- Color coded for easy identification
- Zinc coated terminal to resist corrosion
- Contains gaskets, o-rings or seals to replace the switch properly
- Brass construction for accurate temperature sensing
A temperature gauge that reads wrong or jumps around, or a check engine light, can mean the switch is wearing out, but wiring or a loose connector can trigger those too. Before you replace it, look over the terminal and connector with the engine off and cool for corrosion, damage or coolant seepage.
Along with the 2002-2005 Chevrolet Trailblazer, it fits the 2002-2005 GMC Envoy, the 2004-2005 Buick Rainier and many other vehicles. If your vehicle isn't named here, look it up in the "Vehicles it fits" section by year and engine.
Specifications
- Material: brass
- Terminal: zinc coated
- Identification: color coded
Interchange: 12564512 · 12575198 · 19244715 · 1712467 · 1712578 · 8125645120 · 8192447150 · A14216 · CT0099 · SU1485
This part cross-references / interchanges with the following part numbers:
37866, 12564512, 12575198, 19244715, 1712467, 1712578, 8125645120, 8192447150, A14216, CT0099, SU1485
Frequently Asked Questions
Will the 37866 work as a Trailblazer switch on a 2002-2005 Chevrolet Trailblazer?
Yes, Four Seasons 37866 fits the 2002-2005 Chevrolet Trailblazer. If you drive another vehicle, check your own year and engine in the "Vehicles it fits" section.
Does an Envoy switch like this one fit the 2002-2005 GMC Envoy?
Yes, Four Seasons 37866 fits the 2002-2005 GMC Envoy, and it also fits the 2004-2005 Buick Rainier.
Is the Four Seasons 37866 switch made of brass?
Yes, the Four Seasons 37866 switch has brass construction, which is there for accurate temperature sensing.
Do gaskets, o-rings or seals come with this coolant temp sensor switch?
Yes, this switch contains gaskets, o-rings or seals so it can be replaced properly.
Does the Four Seasons 37866 replace part number A14216?
Yes, A14216 is one of the numbers Four Seasons 37866 replaces, along with 12564512 and SU1485.
