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When a Chevrolet Colorado thermostat functions properly, your engine reaches and holds the correct operating temperature for fuel efficiency, emissions control, and cabin comfort. Choosing the right thermostat matters because an incorrect or failing unit can cause long warmups, overheating, or poor heater performance. This guide highlights seven shortlisted Chevrolet Colorado thermostats selected for accurate fitment, dependable sealing, and durable materials. We evaluated each option on fitment compatibility and build quality to help you pick the most appropriate replacement. Read on for the criteria we used and the factors to consider before you replace the thermostat.
Looking for other parts? See all Chevrolet Colorado parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | GM Genuine Parts Engine Coolant Thermostat (OEM 12632948) |  |
| Most Popular A crowd favorite that many people choose with confidence | ACDelco GM Original Equipment 131-160 Engine Coolant Thermostat Kit |  |
| Best Quality Built to a higher standard if you want something more solid | GM Genuine Parts 15-11073 Engine Coolant Thermostat and Housing Assembly |  |
| Best Budget The cheapest option that still gets the job done reliably | Forlevlaep Thermostat and Housing Assembly for Chevrolet Colorado |  |
| Most Sold A high-volume bestseller chosen again and again | Gates OE-Type Engine Coolant Thermostat (34198) |  |
| Best Value for Money The sweet spot between price and what you get | Gates 33910 Integrated Housing Engine Coolant Thermostat |  |
| Best Overall The best all-around choice for most situations | Dorman Integrated Thermostat Housing Assembly 902-2090 |  |
1. GM Genuine Parts Engine Coolant Thermostat (OEM 12632948)
| Brand | GM Genuine Parts |
|---|---|
| Manufacturer Part Number | 131-151 |
| OEM Part Number | 12632948 |
| Included Components | Engine Coolant Thermostat |
This GM Genuine Parts engine coolant thermostat is a factory-style replacement that regulates coolant flow between the engine and radiator so the Chevrolet Colorado reaches and holds its correct operating temperature. It installs like a standard thermostat and is intended for use when replacing a worn or sticking unit; buyers report straightforward fit and quick installation on GM V6 and four-cylinder applications. The unit is manufactured to GM specifications for fit, form, and function, which helps preserve factory temperature behavior and engine management calibration. Practical benefits include reliable temperature control, consistent warm-up times, and the durability expected from a manufacturer part. Limitations are minimal but worth noting: the package may include a generic seal that some installers swap for a better-fitting gasket, and temperature rating options are fixed to the part number rather than adjustable. Expect OEM-level performance rather than performance-tuning changes to thermostat behavior.
Best for: Reliability-focused buyers who prioritize preserving factory cooling behavior and avoiding coolant-related drivability issues in their Chevrolet Colorado.
Less Ideal for: Drivers seeking modified engine cooling behavior, aftermarket temperature tuning, or adjustable thermostat solutions should consider performance-oriented alternatives.
- Factory-quality fit and construction for GM vehicles
- Manufactured to GM specifications for consistent temperature control
- Direct replacement that preserves factory engine warm-up and sensor behavior
- Widely reported easy installation and reliable performance in GM trucks
- Seal supplied with the unit can be undersized for some housings requiring replacement
- Only one temperature specification per part number with no adjustable options
Verdict Choose this GM genuine thermostat for factory-correct, reliable temperature control in a Chevrolet Colorado when you want OEM fit and durability.
2. ACDelco GM Original Equipment 131-160 Engine Coolant Thermostat Kit
| Manufacturer Part Number | 131-160 |
|---|---|
| OEM Part Number | 89018168 |
| Included Components | Thermostat, gasket |
| Temperature Control Type | Cooling |
This ACDelco GM Original Equipment thermostat kit is a direct-fit replacement designed to control coolant flow and help the engine reach and maintain normal operating temperature. It ships with the thermostat and a gasket, so it supplies the basic parts needed for a straightforward swap during routine cooling-system maintenance. The unit is made to GM specifications, which makes installation and alignment with the factory housing simple for technicians and DIYers familiar with Chevrolet cooling systems. In use it behaves like a factory-quality part, opening at its rated temperature to allow coolant circulation and keeping operating temps within the expected range. Note that this is a single-purpose replacement part with no additional seals or sensors included, so if your Colorado has related component wear you may need extra parts. Also expect the usual coolant draining and bleeding steps during replacement, which can add time compared with plug-and-play electrical parts.
Best for: Buyers who prioritize convenience and want a factory-quality, direct-replacement thermostat that reduces guesswork and fitment headaches for routine Chevrolet Colorado cooling-system repairs.
Less Ideal for: If you prefer a bundled overhaul that replaces hoses, clamps, or sensors at the same time or need a performance thermostat with a different opening temperature, choose a more comprehensive kit or specialty unit instead.
- Includes both thermostat and gasket for a single replacement service
- Manufactured to GM original-equipment specifications for fit and function
- Direct-fit design simplifies installation and alignment in the cooling-housing
- Widely used across GM vehicle applications with strong user reports of correct operation
- Contains only the thermostat and gasket so additional worn cooling parts must be purchased separately
- Does not include installation instructions beyond standard GM guidance
Verdict A factory-quality, direct-fit thermostat kit that makes convenient, reliable replacement for Chevrolet Colorado cooling repairs quick and predictable.
3. GM Genuine Parts 15-11073 Engine Coolant Thermostat and Housing Assembly
| Manufacturer | ACDelco |
|---|---|
| Manufacturer Part Number | 15-11073 |
| OEM Part Number | 12622316 |
| Material | Brass, Stainless Steel, High-temperature Plastic |
| Specification Met | GM OE |
This GM Genuine Parts thermostat and housing assembly replaces the engine thermostat and water inlet in compatible Chevrolet Colorado engines to control coolant flow and help the engine reach and maintain normal operating temperature. It is a one-piece replacement that includes the thermostat and the housing with factory-style mounting and sensor ports, so installation restores the original coolant routing and sensor locations. Buyers will notice factory fit and finish, a durable machined exterior, and materials suited to hot coolant service, which makes it a reliable fix for a stuck or out-of-calibration thermostat that triggers cold-run codes or poor temperature regulation. Installation can require removing the wheel well or alternator depending on vehicle year and access, so expect a moderate DIY job or a short shop visit. The product is a direct factory-spec replacement, but it does not include hoses or hardware beyond the assembly itself and the job can demand basic hand tools and some patience to reach the top bolt.
Best for: Performance-oriented owners who prioritize factory-spec replacement parts to restore precise engine temperature control and consistent running conditions.
Less Ideal for: Buyers wanting a low-effort plug-and-play upgrade with extra hardware included or those seeking an aftermarket high-flow performance thermostat variant.
- Factory-quality fit and finish designed to match GM specifications for direct replacement
- Includes both thermostat and housing so sensor ports and coolant routing are restored
- Durable materials (brass, stainless steel, high-temperature plastic) for heat and corrosion resistance
- Positive long-term user reports showing reliable temperature regulation after installation
- Installation may require removing the wheel well or other components, making DIY time moderate
- Does not include additional hoses, clamps, or coolant needed for a full service
Verdict A reliable factory-spec thermostat and housing assembly for Chevrolet Colorado owners who want a direct, long-lasting replacement to restore accurate engine temperature control.
4. Forlevlaep Thermostat and Housing Assembly for Chevrolet Colorado
| Material | Metal |
|---|---|
| Gasket Included | Yes |
| Mounting Hole Quantity | 2 |
| Outlet Port Quantity | 1 |
This thermostat and housing assembly is a direct replacement kit intended for Chevrolet Colorado engines across several years and displacements. It combines a metal housing, thermostat, and gasket in one package so you can swap the entire coolant outlet during a service or repair. The housing is cast from aluminum for better heat transfer than plastic housings, which helps the cooling system respond quickly under load. Installation is typical of a thermostat housing job: drain some coolant, remove the old housing, replace the gasket and thermostat, and reinstall. The kit includes the thermostat and gasket but does not include mounting hardware, so expect to reuse bolts or source replacements if needed. For a budget repair this item offers a complete, factory-replacement style fitment for Colorado models listed in the fitment guide, but buyers should confirm engine and year compatibility before purchasing and be prepared to handle coolant flushing and proper torque on the housing to avoid leaks.
Best for: Cost-conscious Colorado owners who want a full thermostat and housing swap without buying parts separately and who are comfortable performing routine coolant system maintenance.
Less Ideal for: Drivers seeking a lifetime or heavy-duty upgraded solution or professional installers who prefer kits that include all fasteners and new hardware.
- Includes thermostat and gasket for a one-stop replacement
- Aluminum housing improves heat transfer compared with plastic housings
- Replaces factory part numbers listed for direct fit on supported Colorado engines
- Polished exterior finish for a cleaner under-hood appearance
- Mounting hardware is not included, so bolts may need to be reused or purchased separately
- Fitment varies by engine and year so compatibility must be checked carefully
Verdict A wallet-friendly replacement kit that bundles the thermostat and gasket with an aluminum housing for direct-fit repairs on compatible Chevrolet Colorado engines.
5. Gates OE-Type Engine Coolant Thermostat (34198)
| Manufacturer Part Number | 34198 |
|---|---|
| Manufacturer | Gates |
| Position | Center |
| Exterior | Machined |
This Gates OE-Type thermostat is a straightforward factory-quality replacement that controls coolant flow to maintain proper engine temperature. Designed to fit like the original, it installs in the thermostat housing and opens and closes at the calibrated temperature to prevent overheating or overcooling. Notable features include factory calibration for reliable opening and closing, jiggle pins to vent trapped air, and a machined exterior with the manufacturer part number for easy identification. In practice the part provides predictable temperature regulation and a leak-free fit when the housing and seals are in good condition, which helps the cooling system reach and hold operating temperature quickly after cold starts. The main limitations are that it is a direct replacement part rather than an upgraded high-performance thermostat, and correct fit depends on matching the vehicle’s OEM part number and proper installation to avoid leaks. For routine maintenance or replacing a failed thermostat on a Chevrolet Colorado, it delivers the expected, dependable performance of a mainstream aftermarket brand.
Best for: Risk-averse mainstream Chevrolet Colorado owners looking for a reliable, factory-quality replacement part to restore proper cooling system function without experimentation.
Less Ideal for: Drivers seeking performance-tuned thermostats or custom temperature behavior should consider specialty options instead of this stock-equivalent unit.
- Factory-calibrated opening and closing for consistent engine temperature control
- Jiggle pin design helps vent trapped air for quicker system bleeding
- Machined exterior and correct part numbering for accurate fit identification
- Trusted aftermarket brand with many user reports of correct fit and reliable operation
- Direct replacement only, not a higher-temperature or performance thermostat option
- Effectiveness depends on correct installation and condition of surrounding seals and housing
Verdict A dependable, factory-style replacement thermostat that restores correct cooling control for the Chevrolet Colorado without performance upgrades.
6. Gates 33910 Integrated Housing Engine Coolant Thermostat
| Manufacturer Part Number | 33910 |
|---|---|
| Material | Aluminum |
| Included Components | Engine Coolant Thermostat |
| OEM Part Number | 12562740, 12571261 |
The Gates 33910 is an integrated housing thermostat assembly that replaces the factory thermostat on compatible Chevrolet Colorado applications. It combines the thermostat and housing into a single aluminum unit with a reverse poppet design and jiggle pin valves to reduce leakage and help the valve stay closed under pump pressure until the calibrated opening temperature. In practice this means a straightforward swap when you are servicing the cooling system or replacing a leaking housing, and users report dependable fit and leak-free operation when paired with the correct water pump. The 187 degree opening temperature preserves factory thermal control for emissions and engine warm-up behavior. Limitations are that it is vehicle-specific so verifying Colorado fitment is essential, and integrated housings can be slightly more costly to replace than a simple thermostat cartridge if only the valve has failed. For Colorado owners looking to restore factory cooling performance, this is a practical, nearly direct replacement that simplifies installation and reduces leak points compared with separate housings and thermostats.
Best for: Practical optimizers who want a straightforward, long-lasting factory-style replacement for their Chevrolet Colorado cooling system and value reducing repeat repairs.
Less Ideal for: Drivers who want to change engine warm-up behavior with a lower-temperature thermostat or prefer separate cartridge-style thermostats for lower replacement cost should consider other options.
- Integrated housing and thermostat simplifies installation and reduces separate leak points.
- Reverse poppet design and jiggle pin valve reduce leakage when the engine is cold.
- Aluminum machined exterior for durable, factory-quality fit and finish.
- Listed OEM part cross-references for direct vehicle replacement.
- Opens at 187 degrees which matches factory behavior but limits lower-temperature performance options.
- Integrated unit means replacing the housing if only the thermostat element fails.
Verdict A durable, integrated factory-style thermostat housing that gives Colorado owners a practical, leak-resistant replacement to restore original cooling performance.
7. Dorman Integrated Thermostat Housing Assembly 902-2090
| Brand | Dorman |
|---|---|
| Manufacturer | Dorman Products |
| Manufacturer Part Number | 902-2090 |
| OEM Part Number | 815-207; 81507; SK34836; 12666569; 12674639 |
This Dorman integrated thermostat housing assembly replaces the factory water outlet and thermostat in compatible GM applications. It combines the housing and thermostat into one unit to simplify installation and reduce leak points. In everyday use it restores normal coolant flow and temperature regulation, helping the engine reach operating temperature faster and maintaining consistent gauge readings and heater performance. The part is machined for a factory-style fit and is designed to tolerate wide temperature swings to resist cracking and leaking. Installation is a straightforward bolt-and-hose swap for mechanically inclined owners and independent shops; several user accounts report an easy replacement with no leaks when following basic coolant-drain and refill steps. The main limitations are that fitment is vehicle-specific so you must confirm your trim and year, and integrated assemblies mean you replace the thermostat any time the housing is serviced rather than swapping just the valve. For Chevrolet Colorado owners seeking a reliable, direct-fit replacement this delivers a near-factory repair without specialty tools.
Best for: Balanced owners who want a reliable, near-factory repair that is easy to install and restores proper temperature control without seeking OEM parts.
Less Ideal for: Drivers who prefer to replace only the thermostat valve or who need a universal, multi-vehicle solution should look at alternatives.
- Integrated housing and thermostat simplifies replacement and reduces potential leak points
- Machined exterior and factory-style fit for straightforward installation
- Engineered to withstand extreme temperature changes to reduce cracking and leaking
- Widely reported to restore normal operating temperature and improve cabin heat
- Integrated design requires replacing the entire assembly if only the thermostat fails
- Compatibility is specific to model years and trims so fit must be verified before purchase
Verdict A dependable, integrated thermostat housing that gives Chevrolet owners a near-factory replacement with easy installation, provided you confirm exact fitment first.
Choosing the Right Chevrolet Colorado Thermostat: Key Factors to Consider
Fitment and Part Number Accuracy
Correct fitment is essential because a thermostat that does not match the vehicle’s flange pattern, housing dimensions, or part number can lead to poor sealing, coolant leaks, or interference with surrounding components. Verify manufacturer part numbers and vehicle year/model fitment notes before purchasing.
Mismatched units may require machining or adapter parts, which can compromise reliability. Choosing a thermostat explicitly documented for Chevrolet Colorado reduces installation time and the chance of return or rework.
Thermostat Opening Temperature
The thermostat’s rated opening temperature directly affects engine warmup and operating consistency. A valve that opens too early can cause the engine to run cold, reducing efficiency and heater performance. One that opens too late can lead to overheating and increased stress on cooling system components.
Match the thermostat’s opening point to the vehicle’s required specification or the manufacturer-recommended temperature range to preserve proper engine management behavior.
Material and Corrosion Resistance
Thermostats operate in a harsh environment of coolant and fluctuating temperatures, so materials and coatings matter for longevity. Corrosion-resistant metals and durable rubber seals help prevent premature failure and coolant contamination.
Poor materials can lead to valve sticking, seal degradation, or accelerated wear of the housing, which increases the risk of leaks and the need for repeat service.
Seal and Housing Design
The quality of the seal and how the thermostat integrates with its housing determine coolant tightness and long-term reliability. A well-designed seal compresses evenly, resists heat and oil exposure, and maintains contact despite thermal cycling.
Consider whether the thermostat includes an integrated gasket or requires a separate seal, and how the housing interface aligns with the vehicle’s coolant passages to avoid stress points that promote leaks.
Valve and Spring Construction
The internal valve and spring determine actuation responsiveness and durability. A precisely calibrated spring helps ensure the valve opens at the correct temperature and closes securely when cooled, preventing bypass flow or delayed opening.
Look for robust mechanical construction that tolerates repeated thermal cycling without losing tension or deforming, as failures in these internal components lead to symptoms like overheating or running cold.
Installation Ease and Documentation
Ease of installation affects both the time and the likelihood of successful replacement. Clear installation notes, correct torque specs for housing bolts, and guidance on seal placement reduce the chance of leaks or improper installation.
Good documentation also helps non-professional installers confirm fitment and follow recommended procedures, such as coolant draining, bleeding, and torque sequencing, which contribute to a reliable repair.
FAQ
What are common signs of a bad Chevrolet Colorado thermostat?
Common signs include the engine taking too long to reach operating temperature, the temperature gauge running unusually high, or the heater producing little heat. You may also notice intermittent temperature swings or coolant leaks near the thermostat housing. These symptoms often indicate the valve is stuck open or closed or that seals have deteriorated.
How can I test a thermostat before installation?
A basic test involves removing the thermostat and placing it in a pot of water with a calibrated thermometer, then heating the water and observing the valve. The thermostat should begin to open near its rated temperature and be fully open a short way above that point. While informative, this bench test does not replicate in-vehicle conditions and should be combined with checks for valve movement and seal integrity.
Will a thermostat housing seal leak cause overheating?
A leaking housing seal can allow coolant to escape and reduce the system’s ability to circulate coolant effectively, which may contribute to overheating if significant fluid is lost. Small leaks can also introduce air into the cooling system, causing hot spots and inconsistent temperature readings. Addressing seals promptly helps avoid secondary cooling system issues.
What does it mean if the engine is running cold after thermostat replacement?
If the engine runs cold after replacing the thermostat, the replacement may have a lower opening temperature than specified or the valve could be stuck open. Other causes include incorrect part fitment or installation errors that keep the thermostat from closing properly. Verify part specifications and installation steps to ensure the unit matches the vehicle’s required temperature range.
How do I confirm thermostat part number fitment for my Colorado?
Check the vehicle’s model year and engine specification against the supplier’s fitment chart or part number cross-reference. OEM or manufacturer documentation typically lists compatible part numbers and any applicable engine variants. If documentation is unclear, consult a service manual or a qualified technician for confirmation.
Are there tradeoffs between durability and ease of installation?
Sometimes yes. Thermostats with integrated housings or reinforced seals may offer improved durability but can be bulkier or require more steps to install. Conversely, simple replacement units may be easier to fit but use lighter materials. Balance your priorities between long-term reliability and the complexity of installation based on how long you expect the part to last and your comfort with the repair process.
How We Chose the Best Chevrolet Colorado Thermostat
We focused on fitment and durability as primary selection filters to ensure each thermostat matched Chevrolet Colorado specifications and stood up to under-hood conditions. Key evaluation criteria included housing and seal design to limit coolant leaks, temperature tolerance and opening range to match engine calibration, material quality for corrosion resistance, and valve and spring construction for reliable actuation. We also considered ease of installation, including whether the part aligns with common removal and reinstallation steps, and the availability of clear fitment documentation or part number cross-references. Units were excluded if documentation did not confirm direct fitment for Chevrolet Colorado model years or if the construction suggested use of inferior materials prone to corrosion. We did not include aftermarket items lacking any technical specifications or third-party reliability data. The list prioritizes products that meet mechanical fit, thermal performance, sealing integrity, and installation practicality for Colorado owners.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize correct fitment, the proper opening temperature, and robust sealing when choosing a Chevrolet Colorado thermostat. These three dimensions most directly affect engine warmup behavior, heater performance, and the risk of leaks or overheating. Be mindful of materials and internal construction, and choose units with clear fitment documentation and installation guidance. Balancing durability against installation complexity will help you select a thermostat that delivers dependable performance for your Colorado.
Explore More:
- Check out all Chevrolet Colorado parts & accessories
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