The thermostat sits in the engine’s thermostat housing at the front of the engine, where the upper radiator hose connects. The basic location is the same whether your Blazer uses the 2.0L turbo or the 3.6L V6, though the exact housing is mounted in a slightly different spot depending on the engine layout.
Understanding the thermostat’s placement helps with diagnosis and potential replacement. This article explains the general location and how to spot the housing in the engine bay, with notes on variations by engine option and practical tips for safe inspection.
Where to look by engine configuration
2.0L turbo inline-4 (LTG) configuration
In the Blazer with the 2.0L turbo, the thermostat housing is located toward the front of the engine where the upper radiator hose attaches. It is part of the water outlet assembly and is typically visible after removing the engine cover or some surrounding components. Access is from the engine bay with the hood up; proceed only when the engine is cool to avoid burns from hot coolant.
3.6L V6 (LGX) configuration
In the Blazer with the 3.6L V6, the thermostat housing is also at the front of the engine, connected to the radiator hose, but its exact orientation may differ from the 2.0L. It sits as part of the front water outlet assembly near the cylinder head and can require more clearance or removal of nearby covers to access.
Note: AWD in these models does not place the thermostat in a different location from their rear-drive or FWD variants; the hoses and housing layout define access. Always verify by referencing the service manual for your exact engine code (LTG for 2.0L or LGX for 3.6L) and year/model within the Blazer lineup.
Practical tips for locating safely
When searching for the thermostat housing, begin with the upper radiator hose. Trace it to the metal housing mounted on the engine. If you see a housing with a temperature sensor and a smaller bypass hose, you’ve found the thermostat. Always ensure the engine is cool before touching coolant components, and relieve system pressure only after the radiator cap is cool to avoid scalding.
Dealing with cooling system components can be complex. If you’re not confident, consult a trained technician or your Chevrolet dealer to avoid damage or leaks.
Summary
The thermostat in the 2020 Chevy Blazer AWD is located in the thermostat housing at the front of the engine where the upper radiator hose attaches. The general location is consistent across the two available engines—2.0L turbo (LTG) and 3.6L V6 (LGX)—with only small differences in exact housing orientation. For service, identify the housing by tracing the upper radiator hose, and consult the vehicle’s service manual or a qualified technician if you’re unsure.