GM GENUINE PARTS Engine Coolant Thermostat Kit 131-163 (97241129) with Gasket — OE Fit & Reliable Temperature Control

GM Genuine Parts 131-163 (97241129) is an original-equipment engine coolant thermostat kit that includes the thermostat and gasket engineered to restore proper coolant flow and temperature control in compatible GM vehicles.

This GM-recommended thermostat kit replaces the factory unit with a part built to the same specifications used on original vehicles. Designed and tested for fit, function, and durability, the kit helps the engine reach and maintain optimal operating temperature by regulating coolant circulation through the radiator. The package contains the thermostat assembly plus the matching gasket you need for a complete, reliable replacement.

How does this thermostat regulate engine temperature?

The thermostat opens and closes based on coolant temperature, allowing flow to the radiator only when needed so the engine warms quickly and stays within its designed temperature range. This reduces cold-start wear and prevents overheating once the engine reaches operating temperature.

• Temperature-sensitive valve opens at the specified set point to permit coolant flow
• Closes during warm-up to speed engine reach to normal temperature
• Works with the vehicle’s cooling system pressure and coolant pathways

Why choose the GM Genuine Parts (OE) thermostat over aftermarket options?

As an OE part manufactured to GM specifications, this thermostat matches the original in dimensions, materials, and performance characteristics. That fit-for-purpose design reduces installation issues and delivers predictable operation throughout its service life.

• Manufactured to GM OE specifications for fit, form, and function
• Tested to be free of manufacturing defects in materials and craftsmanship
• Includes the correct gasket for a proper seal at installation

What comes in the kit and what should I expect during replacement?

The kit contains the thermostat unit and the corresponding gasket required for a correct seal. Expect a direct swap with the vehicle’s original thermostat housing; however, always follow the vehicle service manual for coolant draining, torque specs, and bleed procedures.

• Thermostat assembly sized for compatible GM models
• Matching gasket to prevent leaks at the housing flange
• Replaces factory component without modification when matched to vehicle application

How long will this thermostat last and how can I tell if it needs replacing?

When installed correctly and used with proper coolant and maintenance, an OE thermostat typically lasts many years. Symptoms of a failing thermostat include extended warm-up time, engine running too cool, temperature fluctuations, or coolant leaks around the housing.

• Durability aligned with GM OE quality and testing standards
• Replace if you observe erratic temperature readings or coolant seepage
• Inspect during regular cooling-system service intervals

Who is this for: Drivers and technicians working on GM vehicles that call for part number 131-163 (97241129) who want a direct-equivalent replacement that maintains factory fit and function. This kit is suited to owners preferring OEM-level reliability for cooling-system repairs, fleet maintenance managers seeking consistent parts, and do-it-yourselfers following vehicle-specific service procedures. Always verify vehicle compatibility by VIN or parts lookup before ordering to ensure proper application.