ACDelco 131-151 | Engine Coolant Thermostat

Part Number
Engine Coolant Thermostat

Fits: Cadillac Escalade, Chevrolet Astro, Chevrolet Blazer, Chevrolet C1500, Chevrolet C1500 Suburban, Chevrolet C2500, Chevrolet C2500 Suburban, Chevrolet C3500, Chevrolet Express 1500, Chevrolet Express 2500, Chevrolet Express 3500, Chevrolet K1500, Chevrolet K1500 Suburban, Chevrolet K2500, Chevrolet K2500 Suburban, Chevrolet K3500, Chevrolet P30, Chevrolet S10, Chevrolet Silverado 1500, Chevrolet Silverado 1500 Classic, Chevrolet Tahoe, GMC C1500, GMC C1500 Suburban, GMC C2500, GMC C2500 Suburban, GMC C3500, GMC Jimmy, GMC K1500, GMC K1500 Suburban, GMC K2500, GMC K2500 Suburban, GMC K3500, GMC P3500, GMC Safari, GMC Savana 1500, GMC Savana 2500, GMC Savana 3500, GMC Sierra 1500, GMC Sierra 1500 Classic, GMC Sonoma, GMC Yukon, Oldsmobile Bravada

Special Price $27.19 Regular Price $31.99
In stock
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Estimated Ship Date: 1 Business Day or Less
ACDelco GM Original Equipment Engine Coolant Thermostats control the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature, and are GM-recommended replacements for your vehicle's original components. These original equipment engine coolant thermostats 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 -



  • Cadillac;Chevrolet;Chevrolet;GMC;GMC;Oldsmobile
  • Controls the flow of coolant through your vehicle's radiator to help the engine reach and maintain its 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


Good Maintenance Practices - Section 1 - Bullet 1Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating
Good Maintenance Practices - Section 1 - Bullet 2Use the recommended coolant type for your vehicle
Jiggle Pin Weep HoleNo
Length (in)2.3
Opening Temperature (Deg. F)198
Overall Height (in)2.263
Overall Height (mm)57.5
Programming RequiredNo
Seal TypeGasket
Weight (lb)0.17
Width (in)2.3




  • 1996-2000 GMC K2500
  • 1996-2005 Chevrolet Express 2500
  • 1996-1999 Chevrolet K1500 Suburban
  • 1996-1999 Chevrolet C1500
  • 1996-2000 Chevrolet C3500
  • 1999-2000 Cadillac Escalade
  • 1996-2005 GMC Safari
  • 1996-2000 Chevrolet C2500
  • 1996-2002 GMC Savana 3500
  • 1996-2000 Chevrolet K2500
  • 1996-2000 GMC C2500
  • 1996-2000 GMC C3500
  • 1996-1999 Chevrolet K1500
  • 1996-2002 Chevrolet Express 3500
  • 1996-2004 Chevrolet S10
  • 1996-2014 Chevrolet Express 1500
  • 1996-1999 GMC C2500 Suburban
  • 2005-2005 GMC Jimmy
  • 1996-2005 GMC Savana 2500
  • 1996-2001 Oldsmobile Bravada
  • 1996-1999 GMC K1500 Suburban
  • 1996-1999 GMC K2500 Suburban
  • 1996-2000 GMC K3500
  • 1996-1999 GMC C1500 Suburban
  • 1996-1999 Chevrolet P30
  • 1996-2004 GMC Sonoma
  • 1996-2002 GMC Jimmy
  • 2007-2007 Chevrolet Silverado 1500 Classic
  • 1999-2013 Chevrolet Silverado 1500
  • 1996-2005 Chevrolet Blazer
  • 1996-2005 Chevrolet Astro
  • 1996-2000 Chevrolet K3500
  • 2007-2007 GMC Sierra 1500 Classic
  • 1999-2013 GMC Sierra 1500
  • 1996-1999 GMC K1500
  • 1996-2000 GMC Yukon
  • 1996-1999 Chevrolet C2500 Suburban
  • 1996-1999 Chevrolet K2500 Suburban
  • 1996-1999 GMC P3500
  • 1996-1999 Chevrolet C1500 Suburban
  • 1996-2000 Chevrolet Tahoe
  • 1996-1999 GMC C1500
  • 1996-2014 GMC Savana 1500
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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