Typically, replacing the thermostat on a 2019 Colorado runs about $200 to $500, depending on the engine and whether additional cooling-system work is needed.
Engine options and cost ranges
Costs vary by the Colorado's engine configuration since access and part price differ between the 2.5L I-4, the 3.6L V6, and the 2.8L Duramax diesel.
- 2.5L gasoline I-4: Typical total replacement cost ranges from about $200 to $350, depending on labor rates and coolant disposal fees. Parts usually run under $40 and labor around 1–2 hours.
- 3.6L gasoline V6: Expect roughly $250 to $420 total, with potentially longer labor time (2–3 hours) due to higher engine bay complexity and access.
- 2.8L Duramax diesel: Replacement can range from about $350 to $600, reflecting higher labor complexity and diesel-specific coolant considerations.
The ranges above reflect typical shop quotes in the United States and can vary by region, shop rate, and whether you upgrade to a thermostat housing gasket or replace adjacent components.
What affects the final price
Several factors influence the final quote beyond engine choice. The following list outlines key considerations.
- Labor rates in your area, which vary widely by region and shop type.
- Whether coolant needs replacement or a flush, plus the cost of new coolant.
- Whether the thermostat is in a separate housing or integrated with the water pump or housing, which can change parts cost and labor time.
- Access difficulty and required component removal (air intake, belts, hoses, etc.).
- Whether the work is done at a dealership vs. independent shop, which affects warranty options and pricing.
Ask for a written estimate that itemizes parts, labor, and any extra services to avoid surprise charges.
Summary
For a 2019 Colorado, thermostat replacement typically runs from a couple of hundred dollars to six hundred, depending on engine configuration, location, and whether additional cooling-system work is needed. To obtain an accurate price, get multiple written estimates from local shops and specify your engine type, coolant requirements, and any related components that might be replaced during the job.