ACDelco 131-120 | Engine Coolant Thermostat Kit

Part Number
Engine Coolant Thermostat

Fits: 98-05 Buick LeSabre, 98-05 Buick Park Avenue, 98-04 Buick Regal, 98-99 Buick Riviera, 98-02 Chevrolet Camaro, 98-99 Chevrolet Lumina, 98-05 Chevrolet Monte Carlo, 98-99 Oldsmobile 88, 98-99 Oldsmobile Intrigue, 98-99 Oldsmobile LSS, 98 Oldsmobile Regency, 98-05 Pontiac Bonneville, 98-02 Pontiac Firebird, 98-08 Pontiac Grand Prix, 00-05 Chevrolet Impala, 05-09 Buick Allure, 05-09 Buick LaCrosse, 06-08 Buick Lucerne

Special Price $22.94 Regular Price $26.99
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ACDelco GM Original Equipment Engine Coolant Thermostat Kits help control the flow of coolant through your vehicle's radiator to help enable your vehicle's engine to reach and maintain its normal operating temperature, and are GM-recommended replacements for your vehicle's original components. Includes necessary components for installation. These original equipment engine coolant thermostat kits have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. ? WARNING: Cancer and Reproductive Harm -



  • Buick;Chevrolet;Oldsmobile;Pontiac
  • Controls the flow of coolant through your vehicle's radiator to help it reach and maintain optimal operating temperature
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Manufactured to GM OE specification for fit, form, and function
  • Offering the quality, reliability, and durability of GM OE


Gasket ColorBlack
Gasket MaterialRubber
Good Maintenance Practices - Section 1 - Bullet 6Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating
Good Maintenance Practices - Section 1 - Bullet 7Use the recommended coolant type for your vehicle
Height (in)2.03
Jiggle Pin Weep HoleNo
Length (in)3.06
Mount Hole Quantity0
Opening Temperature (Deg. C)90.6
Opening Temperature (Deg. F)195
Programming RequiredNo
Weight (lb)0.16
Width (in)2.03



  • 1998-1998 Oldsmobile Regency
  • 1998-2004 Buick Regal
  • 1998-2005 Buick LeSabre
  • 1998-2005 Buick Park Avenue
  • 1998-2002 Pontiac Firebird
  • 2005-2009 Buick LaCrosse
  • 2000-2005 Chevrolet Impala
  • 1998-2002 Chevrolet Camaro
  • 2005-2009 Buick Allure
  • 1998-1999 Oldsmobile LSS
  • 1998-2005 Chevrolet Monte Carlo
  • 1998-1999 Oldsmobile 88
  • 1998-2005 Pontiac Bonneville
  • 1998-2008 Pontiac Grand Prix
  • 1998-1999 Oldsmobile Intrigue
  • 1998-1999 Chevrolet Lumina
  • 1998-1999 Buick Riviera
  • 2006-2008 Buick Lucerne
Customer Questions
Does AC Delco make Ford parts?
No, AC Delco produces parts primarily for General Motors vehicles and does not make parts specifically for Ford vehicles.
Can I use AC Delco parts to replace OEM parts?
Yes, in most cases AC Delco parts can be used as a replacement for OEM parts. However, it's important to ensure that the parts are compatible with your specific make and model of vehicle.
What AC Delco oil filter do I need?
AC Delco offers a variety of oil filters that are compatible with different makes and models of vehicles. To determine which AC Delco oil filter you need, consult your vehicle's owner's manual or use our online filter lookup tool that matches the make, model, and year of your vehicle.
When to replace the engine coolant thermostat?
The engine coolant thermostat should be replaced if it is not functioning properly or as a preventive maintenance measure after a certain mileage or time interval.
What is an engine coolant thermostat?
An engine coolant thermostat is a component that regulates the flow of coolant through the engine to maintain optimal operating temperature.
Will the engine coolant temperature sensor keep the car from starting?
In most cases, a malfunctioning engine coolant temperature sensor (ECT sensor) will not prevent the car from starting. The engine coolant temperature sensor (ECT sensor) is responsible for monitoring the temperature of the engine coolant and sending that information to the engine control unit (ECU). The ECU uses this information to make adjustments to the fuel mixture and ignition timing for optimal engine performance.
Does PartsHawk carry an engine coolant thermostat for Mazda 6?
Yes, PartsHawk carries an Engine Coolant thermostat for Mazda 6
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