Calorstat TH1538.82 Engine Coolant Thermostat

Engine Coolant Thermostat for OE-Style Cooling Control

Calorstat TH1538.82 is a standard engine coolant thermostat built to OE-grade specifications for precise coolant flow control. With a 180°F opening temperature, it supports stable operating temperature in a wide range of Chevrolet, GMC, Ford, Lincoln, Toyota, Volkswagen, Cadillac, Oldsmobile, Isuzu, and GMC applications.

Use TH1538.82 when you need a direct-fit thermostat for vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Express 1500. The Calorstat TH1538.82 thermostat is also cross-referenced to common replacement numbers for the same application.

Key Features

• Engine coolant thermostat with standard design
• OE grade type for factory-style temperature regulation
• Starts to open at 180°F / 82°C
• Sealing flange outside diameter: 2.1 in.
• Height between flanges: 1.38 in.
• Gasket or seal not included
• Compatible with a broad range of GM truck, van, SUV, and passenger car applications

Detailed Description

This thermostat is designed to regulate coolant flow by opening at 180°F, helping the engine reach and maintain its intended operating temperature. That makes it a practical replacement for cooling system service on vehicles including the Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Express 2500, as well as older platforms such as the Chevrolet Astro, GMC Safari, and Lincoln Town Car. Calorstat TH1538.82 is an OE-grade thermostat for drivers and technicians looking for a factory-style cooling system component.

This part cross-references Four Seasons 33188 and Gates 33188S for the same application.

What It Helps Solve

• Engine running too cool or taking too long to warm up
• Temperature fluctuations caused by a worn thermostat
• Cooling system service on GM trucks, vans, and SUVs
• Replacement needs on 180°F thermostat applications
• Restoring proper coolant circulation in compatible vehicles

Installation Notes and Tips

• Verify the thermostat opening temperature before installation: 180°F / 82°C.
• Confirm housing dimensions and sealing flange size match the original part.
• Inspect the thermostat housing and coolant passages for corrosion or debris before reassembly.
• Because no gasket or seal is included, reuse only if serviceable or source the correct sealing component separately.
• Bleed air from the cooling system after installation to help prevent hot spots and temperature irregularities.

Quality Assurance

Calorstat TH1538.82 is built as an OE-grade replacement thermostat with standard construction and application-specific temperature control. It is listed for fitment across 1995-2014 vehicles, including Chevrolet Express 1500, GMC Savana 1500, Chevrolet Silverado 1500, and related models.

• Fits 2007-2014 Chevrolet Express 1500, N/A
• Fits 1996-2002 Chevrolet Express 1500, N/A
• Fits 2007-2014 GMC Savana 1500, N/A
• Fits 1996-2002 GMC Savana 1500, N/A
• Fits 2007-2013 Chevrolet Silverado 1500, N/A
• Fits 2007-2013 GMC Sierra 1500, N/A
• Fits 2007 Chevrolet Silverado 1500 Classic, N/A
• Fits 2007 Chevrolet Silverado 3500, N/A
• Fits 2007 GMC Sierra 1500 Classic, N/A
• Fits 2005-2006 Volkswagen Jetta, N/A
• Fits 1996-2005 Chevrolet Astro, N/A
• Fits 1996-2005 Chevrolet Blazer, N/A
• Fits 1996-2005 GMC Jimmy, N/A
• Fits 1996-2005 GMC Safari, N/A
• Fits 1996-2004 Chevrolet S10, N/A
• Fits 1996-2004 GMC Sonoma, N/A
• Fits 1996-2002 Chevrolet Express 2500, N/A
• Fits 2001-2002 Chevrolet G30, N/A
• Fits 1996-2002 GMC Savana 2500, N/A
• Fits 1995-2002 Lincoln Town Car, N/A
• Fits 1996-2001 Oldsmobile Bravada, N/A
• Fits 1999-2000 Cadillac Escalade, N/A
• Fits 1996-2000 Isuzu Hombre, N/A
• Fits 1996-1999 Chevrolet C1500, N/A
• Fits 1996-1999 Chevrolet C1500 Suburban, N/A
• Fits 1996-1999 Chevrolet K1500, N/A
• Fits 1996-1999 Chevrolet K1500 Suburban, N/A
• Fits 1996-1999 Chevrolet Silverado, N/A
• Fits 1996-1999 Chevrolet Tahoe, N/A
• Fits 1996-1999 GMC C1500, N/A
• Fits 1996-1999 GMC C1500 Suburban, N/A
• Fits 1996-1999 GMC K1500, N/A
• Fits 1996-1999 GMC K1500 Suburban, N/A
• Fits 1996-1999 GMC Yukon, N/A
• Fits 1995-1997 Ford Thunderbird, N/A
• Fits 1995 Toyota Pickup, N/A