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When your 2007-2013 GMC Sierra 1500 is running too hot or too cold, the thermostat is often the culprit. Choosing the right thermostat restores the cooling system's ability to reach and hold the correct operating temperature, which affects engine efficiency, heater performance, and long-term durability. For the 2007-2013 Sierra 1500, proper fitment, correct opening temperature, and a reliable housing seal are the most important considerations. This guide presents seven shortlisted thermostats selected for their fitment to the 2007-2013 GMC Sierra 1500 and for meeting practical performance and durability expectations. Below we explain what matters when swapping a thermostat, how we evaluated options, and answers to common owner questions to help you pick the best replacement for your truck.
Looking for other parts? See all GMC Sierra 1500 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | MotoRad 523-180 Engine Thermostat |  |
| Best Quality Built to a higher standard if you want something more solid | ACDelco GM Original Equipment 187°F Engine Coolant Thermostat Kit (131-160) |  |
| Best Value The sweet spot between price and what you get | RICHWEI Engine Thermostat, direct replacement |  |
| Best Budget The cheapest option that still gets the job done reliably | MotoRad 2065-180 High Performance Engine Thermostat |  |
| Highest Rated A top-rated pick with lots of positive feedback | GM Genuine Parts Engine Coolant Thermostat (131-151) |  |
| Most Popular A crowd favorite that many people choose with confidence | Gates 33910 Integrated Housing Engine Coolant Thermostat |  |
| Best Seller A high-volume bestseller chosen again and again | Gates OE Type Engine Coolant Thermostat (34198) |  |
1. MotoRad 523-180 Engine Thermostat
| Brand | MotoRad |
|---|---|
| Model | 523-180 |
| Position | Center |
| Construction | Copper case with stainless components |
The MotoRad 523-180 is a vehicle-specific replacement thermostat designed to replace the factory unit in compatible Chevrolet and GMC trucks and SUVs. It uses a copper case and wax element with high-grade stainless components and is tested and calibrated to respond to coolant temperature changes. Installation is straightforward because it is a direct-fit part sized for the thermostat housing and intended to be a one-step swap. In use it aims to maintain normal operating temperature and consistent warm-up behavior, which helps engine efficiency and emissions when the valve opens at its set temperature. Real-world feedback shows many units perform as expected, but some users reported thermostats opening at slightly different temperatures or failing to open, so occasional variation in temperature control is possible. If you want a factory-style replacement from a long-standing supplier and need a direct-fit part for the specified truck model years, this unit delivers a practical, OEM-quality option with easy installation.
Best for: Buyers seeking a direct-fit, factory-quality replacement thermostat for their 2007–2013 GMC Sierra 1500 who prioritize straightforward installation and maintaining original engine warm-up and cooling behavior.
Less Ideal for: Drivers chasing aggressive cooling or lower-than-stock operating temperatures who need a performance thermostat tuned to change engine operating points.
- Direct-fit replacement for specified truck models for simple installation
- Copper case and wax element for responsive temperature activation
- High-grade stainless construction intended to resist corrosion
- Manufactured and tested to factory-quality processes for consistent performance
- Some users report units opening at temperatures different from the advertised set point or failing to open in rare cases
Verdict: A factory-quality, direct-fit replacement thermostat for 2007–2013 GMC Sierra 1500 owners who want an easy OEM-style swap to maintain correct engine temperature control.
2. ACDelco GM Original Equipment 187°F Engine Coolant Thermostat Kit (131-160)
| Manufacturer Part Number | 131-160 |
|---|---|
| OEM Part Number | 89018168 |
| Includes | Thermostat and gasket |
| Opening Temperature | 187°F |
This ACDelco GM Original Equipment thermostat kit replaces the factory thermostat in GM trucks and is sold with the gasket needed for installation. Designed to the same specification used by General Motors, the unit opens at about 187°F to regulate coolant flow and help the engine reach and maintain normal operating temperature. In use it performs like a direct factory replacement: straightforward fitment to the housing, no additional seals or adapters required, and consistent temperature control reported by multiple owners. The kit is simple for a DIY swap or dealer service and removes the guesswork when matching thermostat calibration for a 2007–2013 Sierra 1500. Expect solid build quality and reliable operation, though it does not change the thermostat curve or offer performance-enhancing features such as modified opening temperatures or high-flow designs, so it will not alter warm-up behavior or cooling capacity for towing beyond factory intent.
Best for: Buyers who want a drop-in, factory-spec replacement for a 2007–2013 GMC Sierra 1500 and prioritize correct temperature control and fitment over aftermarket performance changes.
Less Ideal for: Enthusiasts seeking an aftermarket thermostat with an altered opening temperature or improved coolant flow for heavy towing or track use should consider performance-specific options instead.
- Factory-quality fit and calibration matching GM specification
- Includes gasket so you get the parts needed for a direct replacement
- Consistent 187°F opening temperature maintains normal engine operating range
- Widely reported reliable performance by owners of compatible GM trucks
- No performance-oriented or high-flow variant; matches factory behavior rather than improving cooling
Verdict: Choose this ACDelco GM Original Equipment thermostat kit when you want a reliable, factory-matching replacement for a 2007–2013 GMC Sierra 1500.
3. RICHWEI Engine Thermostat, direct replacement
| Brand | RICHWEI |
|---|---|
| Manufacturer Part Number | 89018168 |
| Package Quantity | 1 |
| Compatible Vehicles | Includes 2007–2013, 2019–2021 Sierra 1500 listings |
| Item Weight | 2.71 ounces |
This RICHWEI thermostat is a straightforward factory-style replacement for late-model GM V6 and V8 engines. It installs in the factory housing and is intended to regulate coolant flow and maintain normal operating temperature like a stock unit. The unit is constructed from stamped metal and a valve assembly designed to open at the correct temperature; the listing calls out compatibility with many Chevy and GMC models, including Sierra 1500 applications in the 2007–2013 and 2019–2021 ranges. Buyers report easy installation on full-size trucks and stable temperature control after a few thousand miles. Because it is an aftermarket single thermostat, fitment matters: double-check engine code and year before buying and be prepared to replace the housing gasket if yours is worn. The product comes as one thermostat only and does not include additional seals or hardware beyond the unit itself.
Best for: A practical owner who wants a low-cost, direct replacement thermostat to restore proper cooling performance on a 2007–2013 Sierra 1500 and prefers a simple swap that matches factory function.
Less Ideal for: Do not choose this if you need a performance or high-temperature thermostat, or if you cannot confirm exact engine and year fitment before purchasing.
- Made as a direct replacement intended for factory-style installation
- Multiple customer reports of easy installation on full-size trucks
- Holds engine temperature steady in normal driving according to user feedback
- Fitment is specific and some buyers reported wrong fit for older or non-matching engines
- Ships as the thermostat only without extra housing gasket or mounting hardware
Verdict: A no-frills, factory-style replacement thermostat that gets a Sierra 1500 back to proper operating temperature when matched to the correct engine and year.
4. MotoRad 2065-180 High Performance Engine Thermostat
| Part number | 2065-180 |
|---|---|
| Material | Copper |
| Function | High performance thermostat |
| Power source | Passive/Heat-Activated |
| Meets | Meets or exceeds OEM standards |
The MotoRad 2065-180 is a replacement thermostat built to increase coolant flow and stabilize engine temperature for compatible trucks. It uses a larger-than-factory opening and a triple-bridge design to boost flow by up to 50 percent while keeping the valve stable under pressure. Machined copper construction and a wax-actuated element deliver fast, predictable opening as coolant warms, which helps the engine reach and hold optimal operating temperature more consistently. Install is straightforward for the listed fitments and reviewers report good fitment on late 2000s GM trucks, though some users have needed to swap or reposition the seal during installation. This part meets or exceeds factory specifications and is aimed at owners who want improved thermal management without changing other cooling components. Be aware this is a vehicle-specific replacement so verify exact fitment for a 2007–2013 Sierra 1500 before ordering, and you may need a different O-ring or minor gasket adjustment on some builds.
Best for: Sierra 1500 owners looking for a budget-friendly, higher-flow replacement thermostat to improve cooling performance while retaining factory system design and drivability.
Less Ideal for: Owners planning major engine tuning or aftermarket cooling upgrades who need custom thermostat calibration or non-standard fitments should consider performance-specific options instead.
- Larger opening design increases coolant flow for better temperature control.
- Triple-bridge construction adds stability and strength under system pressure.
- Copper case and wax element provide quick, reliable temperature response.
- Meets or exceeds factory-quality specifications for direct replacement.
- Some users report the supplied rubber seal or O-ring may not seat correctly and could require a different gasket.
Verdict: A cost-effective, higher-flow direct-replacement thermostat that helps 2007–2013 Sierra 1500s reach and maintain proper operating temperature with minimal changes to the cooling system.
5. GM Genuine Parts Engine Coolant Thermostat (131-151)
| Manufacturer Part Number | 131-151 |
|---|---|
| OEM Part Number | 12632948 |
| Material | Metal Alloy Steel |
| 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 engine reaches and holds its normal operating temperature. Intended as a direct-fit GM replacement, it installs like the original part and is used whenever a failing thermostat causes overheating, poor warm-up, or erratic temperature readings. Notable features include GM Original Equipment manufacturing and a supplied seal for installation. In practice that means predictable, factory-quality temperature control, straightforward installation for DIYers and techs, and compatibility with the OEM coolant path. Limitations to note are that the part lineup includes different temperature ratings and seals across variants, so confirm the correct temperature spec and consider buying a better-fitting gasket if you encounter seal play during install. This thermostat focuses on matching factory performance rather than aftermarket performance upgrades like elevated temperature settings or heavy-duty housings.
Best for: Buyers who prioritize long-term reliability and want a thermostat that matches factory performance and fit for trouble-free engine temperature control.
Less Ideal for: Drivers seeking performance-tuned thermostats with higher temperature ratings or reinforced housings for heavy-duty or modified engines should look at aftermarket performance options.
- Factory-quality design for correct fit and function on GM vehicles
- Controls coolant flow to help engine reach and maintain normal operating temperature
- Straightforward direct-replacement install matching original component
- Manufactured to GM specification for consistent durability and performance
- Some users report the included rubber seal can be undersized and may require a different gasket for a more secure fit
Verdict: Choose this GM Genuine Parts thermostat when you want a factory-matching, reliable replacement that restores correct engine temperature control.
6. Gates 33910 Integrated Housing Engine Coolant Thermostat
| Manufacturer Part Number | 33910 |
|---|---|
| Manufacturer | GATES |
| OEM Part Number | 12562740, 12571261 |
| Included Components | Engine Coolant Thermostat |
The Gates 33910 is an integrated thermostat and housing assembly intended as a direct replacement for compatible Vortec LS-series engines. It uses a reverse poppet design with a jiggle-pin valve and a flange valve to reduce coolant leakage and help the thermostat stay closed until the correct opening temperature is reached. In use it installs like a factory part when replacing the thermostat and housing together during a water pump or cooling-system service, and many owners report straightforward fit and reliable operation once installed. Practical benefits include simplified installation compared with separate thermostat and housing parts and reduced chance of small leaks thanks to the leakage-reduction features. Limitations are that fitment is vehicle- and engine-specific so you must confirm it matches your Sierra 1500's engine code and bolt pattern, and DIY installers should transfer any required plug or screw from the old housing to ensure correct fit if applicable.
Best for: Buyers who want a factory-quality, trouble-limiting replacement when servicing the cooling system on a 2007–2013 Sierra 1500 and prioritize proven fit and user feedback over bargain parts.
Less Ideal for: If you need a universal or performance thermostat with a different opening temperature this factory-style integrated unit is not appropriate; consider dedicated performance or universal options instead.
- Integrated housing and thermostat simplifies replacement during water pump or cooling-system jobs
- Reverse poppet and jiggle-pin design helps reduce leakage and hold the valve closed until proper temperature
- Machined aluminum exterior and factory-style fitment for straightforward installation
- Fits specific engines and flange patterns so incorrect selection will not fit without modifications
Verdict: Choose this integrated Gates assembly when you want a factory-style replacement that simplifies installation and minimizes leakage risk on a 2007–2013 Sierra 1500.
7. Gates OE Type Engine Coolant Thermostat (34198)
| Manufacturer Part Number | 34198 |
|---|---|
| Position | Center |
| Exterior | Machined |
| OEM Part Number | 8890181680, 89018168, 89018168 |
This Gates OE Type thermostat is a direct-fit replacement designed to restore proper engine temperature control in vehicles that use this part number. It installs in the center position and includes seals and jiggle pins for air venting to help prevent trapped air after a coolant service. In typical use it maintains the designed opening and closing temperatures so the engine reaches and holds operating temperature reliably, which helps prevent overheating at idle and reduces excessive warm-up. The machined exterior and factory-calibrated valve aim to provide a leak-free fit and consistent performance similar to the factory unit. Limitations: this is a vehicle-specific replacement and must match the Sierra 1500's required part number to fit; it does not change operating temperature range beyond the factory design and offers no performance improvements for modified cooling systems. Buyers should also follow proper coolant flushing and bleed procedures during installation to ensure correct operation.
Best for: A buyer who wants a low-risk, factory-type replacement to restore correct coolant temperature behavior on their 2007–2013 GMC Sierra 1500 and prefers parts that match factory fit and function.
Less Ideal for: Not a fit for owners seeking higher or lower thermostat opening temperatures for performance or heavy towing modifications or for those looking to upgrade cooling capacity beyond stock specifications.
- Factory-equivalent fit and calibration for straightforward replacement
- Includes seal and jiggle pins to help vent air and reduce leak risk after installation
- Machined exterior and quality control aimed at consistent opening/closing behavior
- Only replaces the factory-specified thermostat temperature; not intended for altered cooling or performance tuning
Verdict: Choose this Gates OE Type thermostat when you want a trusted, factory-equivalent replacement to reliably restore correct coolant temperature control on your Sierra 1500.
Choosing the Right 2007-2013 GMC Sierra 1500 Thermostat: Key Factors to Consider
Exact Fitment and Mounting
Thermostat fitment is the foundation of a successful replacement. For the 2007-2013 GMC Sierra 1500 you need a unit that matches the housing flange, bolt pattern, and insertion depth so the valve seats correctly and the bypass passages align.
Incorrect fitment can cause poor sealing, coolant bypassing the thermostat, or interference with the housing cover. When a thermostat does not sit squarely, it may open or close unpredictably, producing temperature swings or persistent overheating. Confirming the mechanical interface prevents unnecessary rework and reduces the chance of leaks after installation.
Opening Temperature and Tolerance
The rated opening temperature determines when coolant begins circulating through the radiator. OEM spec for the Sierra 1500 is designed to balance quick warm-up and efficient cooling. Choosing the correct temperature rating preserves engine efficiency and heater performance.
Tolerance and consistency are just as important as the nominal temperature. A thermostat that opens early or late relative to its rating can cause engine running cold or overheating. Look for parts with documented temperature tolerances and consistent actuation behavior to maintain predictable engine operating temperature.
Seal Type and Housing Interface
The seal between the thermostat and housing prevents coolant leaks and maintains pressure in the cooling system. Some thermostats use a molded rubber gasket, others rely on a separate O-ring or paper gasket. For the 2007-2013 Sierra 1500, the correct seal type and material compatibility with coolant and housing surfaces is vital.
A poor sealing solution will lead to slow leaks or sudden coolant loss. Consider the quality of the mating surface on the thermostat flange and whether the replacement requires a new housing gasket. Durable, heat-resistant sealing materials reduce the risk of gasket degradation and subsequent coolant seepage.
Thermal Flow Characteristics
When the thermostat opens, it must allow sufficient coolant flow for the radiator to control temperatures under load. Flow characteristics depend on valve size, travel distance, and bypass design. A thermostat that restricts flow once open can cause higher-than-expected temperatures under towing or heavy load.
Evaluate whether the replacement maintains adequate flow rates and does not create bottlenecks at typical Sierra 1500 engine speeds. Consider the thermostat's valve design and whether it replicates OEM bypass passages to preserve cooling efficiency when the engine is hot.
Material Durability and Corrosion Resistance
Thermostats and housing interfaces are exposed to coolant chemistry and temperature cycling. Materials that resist corrosion and scale extend service life and minimize the risk of sticking or leaks. Metal components should be corrosion resistant and moving parts should operate smoothly over many cycles.
Plastic housings can be lighter and cheaper but may be more vulnerable to cracking or warping with age. Assess material choices relative to expected operating conditions for a Sierra 1500, especially if the vehicle sees heavy use or extended idling, which stress components thermally.
Ease of Installation and Serviceability
A thermostat replacement is often a DIY job, so installation design matters. Look for units that fit without modifications, use common fastener access, and pair with readily available gaskets or O-rings. A thermostat that simplifies the bleed procedure or aligns with existing coolant hoses reduces installation error.
Consider whether the unit requires special tools or additional parts. Parts that preserve factory interfaces and use standard sealing hardware make future service easier and reduce the chance of needing additional repairs after installation.
Why Thermostat Choice Matters for the 2007-2013 Sierra 1500
Thermostat selection affects warm-up time, heater performance, and engine longevity. In the 2007-2013 Sierra 1500 platform, consistent engine temperature helps maintain fuel efficiency and reduces internal wear. A thermostat that opens at the proper temperature ensures the engine reaches its designed operating window promptly and stays there under load.
Beyond temperature control, the thermostat housing and seal design influence leak potential. Because this truck is often used for towing and hauling, maintaining reliable cooling under sustained loads is especially important.
- Correct opening temperature shortens warm-up and improves cabin heating.
- Reliable seals prevent coolant loss and maintain system pressure.
- Appropriate flow when open avoids overheating under heavy workloads.
Common Thermostat Symptoms to Watch For
Recognizing early symptoms prevents unnecessary engine damage. Typical signs include erratic temperature gauge readings, extended warm-up times, or the cabin heater blowing cold air even after long idling. Overheating that appears only at highway speeds or under tow can indicate a thermostat that sticks closed or does not open fully.
Other symptoms related to sealing problems include slow coolant loss from the housing area or visible seepage around the thermostat cover. Pay attention to sudden coolant level drops and persistent air pockets in the cooling system after service.
- Temperature gauge bouncing or sudden spikes.
- Engine running cold at normal operating conditions.
- Visible coolant seepage or recurring top-up needs.
How To Test a Thermostat on a Sierra 1500
A simple functional check can confirm thermostat behavior without removing it. Warm the engine and watch the temperature gauge. If the engine takes unusually long to reach normal temperature or never stabilizes near the expected range, the thermostat may be stuck open or closed. Visual inspection during a controlled warm-up can reveal when the upper radiator hose begins to heat, indicating the thermostat opened.
For a more definitive test, observe coolant flow at the radiator inlet when the engine reaches operating temperature. Lack of flow when the engine is hot suggests the thermostat is not opening. Always follow safe procedures and avoid direct contact with hot coolant or components.
- Monitor upper radiator hose temperature during warm-up.
- Check for coolant flow at the radiator when engine is hot.
- Look for persistent air pockets after cooling system service.
Thermostat Housing Maintenance Tips
Inspect the thermostat housing and mating surface whenever you replace the thermostat. Clean the flange area to remove old gasket material and corrosion. Replace the housing gasket or O-ring with the appropriate type to ensure a good seal.
Torque bolts to factory specifications to avoid warping the housing. If the housing shows cracks, warpage, or severe corrosion, replace it rather than relying on a replacement thermostat to solve leaks.
- Clean mating surfaces thoroughly before installing a new gasket.
- Use the correct gasket type: molded gasket versus O-ring as specified.
- Torque fasteners evenly to prevent cover distortion.
Bleeding and Filling the Cooling System After Replacement
Air trapped in the cooling system can cause false temperature readings and heater issues. After installing a new thermostat in the Sierra 1500, follow a proper fill and bleed procedure to expel air from the system. This typically involves filling to the specified level, running the engine to operating temperature with the heater on, and topping off as air is purged.
Some Sierra 1500 setups benefit from using the bleed screw location or an upper hose vent to reduce trapped pockets. Recheck coolant level after a short road test and after the engine cools to ensure no further topping-off is needed.
- Run engine to operating temperature with heater on full.
- Use bleed points or upper hose vents to expel trapped air.
- Reinspect coolant after a short drive and after a cool-down cycle.
When to Replace the Thermostat Housing or Gasket
If the housing shows signs of damage or the gasket area is pitted, replace the housing or the gasket during thermostat service. Reusing a faulty housing can lead to leaks and repeat work. Gaskets that compress unevenly or show hardening should always be replaced.
Replacing the housing is advisable when the vehicle has high mileage, visible coolant corrosion, or when previous attempts to stop leaks have failed. Fresh sealing surfaces and new hardware reduce the chance of future leaks and simplify maintenance.
- Replace housing if cracks, warping, or severe corrosion are present.
- Always install a new gasket or O-ring with the new thermostat.
- Consider housing replacement as preventive maintenance on high-mileage trucks.
Still looking for the perfect fit?
Select your GMC Sierra 1500 configuration to see the most relevant Thermostats recommendations
How We Chose the Best 2007-2013 GMC Sierra 1500 Thermostat
We focused on criteria that matter specifically for the 2007-2013 GMC Sierra 1500. First, exact fitment was mandatory: parts had to match OEM mounting patterns, flange dimensions, and thermostat housing interfaces for the 2007-2013 Sierra 1500. Second, controlled opening temperature and tolerance were critical because even small deviations affect warm-up time, emissions, and heater output. Third, thermal performance and flow characteristics were assessed to ensure the thermostat allows proper coolant circulation once open. Durability factors included the quality of the valve and wax or sensor element, corrosion-resistant materials for the housing interface, and the presence of a robust seal to prevent leaks at the thermostat housing. Ease of installation and common compatibility with factory gaskets or O-rings were considered to reduce installation time and potential leak points. We excluded items that required extensive modification, aftermarket housings that change coolant routing, or parts without clear fitment data for the 2007-2013 Sierra 1500. Final selections balanced reliable temperature control, proper mechanical fit, and long-term sealing performance.
Our full evaluation process is outlined in our review methodology.
FAQ
What temperature should the thermostat open on a 2007-2013 Sierra 1500?
Most recommended thermostats for this Sierra 1500 open at the OEM-specified temperature. Exact values can vary slightly, but the right rating restores normal warm-up times and heater performance. Using a thermostat with the correct opening temperature helps maintain engine efficiency.
How can I tell if the thermostat is stuck open or closed?
If the engine never reaches normal operating temperature or the heater stays cold, the thermostat may be stuck open. If the engine overheats quickly or the upper radiator hose stays cool while the engine is hot, the thermostat may be stuck closed. Observing hose temperature and coolant flow gives good diagnostic clues.
Do I need to replace the gasket when changing the thermostat?
Yes. Replacing the gasket or O-ring is a best practice to ensure a proper seal. The gasket material compresses and ages, and reusing an old gasket increases the risk of leaks at the housing.
Can I test the thermostat without removing it?
You can perform basic tests by monitoring warm-up behavior, feeling the upper radiator hose as the engine reaches temperature, and checking for coolant flow at the radiator inlet. These observations often indicate whether the thermostat opens properly without removal.
What causes the thermostat housing to leak after replacement?
Leaks commonly result from improper gasket seating, damaged or warped housing surfaces, or incorrect bolt torque. Also, using the wrong seal type or failing to clean mating surfaces can allow seepage around the thermostat cover.
How long should a replacement thermostat last in a Sierra 1500?
A quality thermostat and proper installation typically last for many years under normal use. Lifespan depends on coolant condition, driving patterns, and whether the housing and seals are installed correctly. Regular coolant maintenance helps extend the service life.
Final Verdict
Prioritize exact fitment, correct opening temperature, and a durable sealing solution when replacing a thermostat in a 2007-2013 GMC Sierra 1500. These choices directly affect warm-up time, heater performance, and cooling reliability under load. Balance thermal performance with material durability and ease of installation to minimize future service. When in doubt, choose the option that most closely matches the factory interface and temperature rating while offering a robust seal. That approach reduces the chance of repeat repairs and keeps your Sierra 1500 running at the right temperature.
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