Gates 33943 Engine Coolant Thermostat

Gates OE Type Thermostat 33943 Overview

Gates 33943 is an OE Type Engine Coolant Thermostat built for precise temperature control and an OEM-equivalent fit. It is a direct replacement for a wide range of Buick, Chevrolet, GMC, Pontiac, Saturn, Saab, and Oldsmobile applications, including popular 180-degree thermostat service jobs.

The Gates OE Type Thermostat line focuses on factory-style operation and leak-resistant sealing for dependable cooling system performance. This 33943 thermostat uses a reverse poppet design with a steel and copper construction, plus an O-ring seal for a clean, OE-style installation.

Key Features

• OE Type Thermostat for factory-style coolant temperature regulation
• Start to open temperature: 180°F / 82°C
• Reverse poppet design for OE-style flow control
• Steel and copper construction
• O-ring seal type for leak-resistant sealing
• OE Performance comparison rating
• Gates part number 33943

Detailed Product Description

Gates 33943 is engineered for vehicles that require a 180-degree engine coolant thermostat, including applications such as the Chevrolet Malibu, Chevrolet HHR, Buick Regal, and GMC Terrain. It is also listed for Buick Verano, Buick LaCrosse, Chevrolet Equinox, Pontiac G6, Saturn Vue, and Saab 9-3 service applications. The thermostat is designed to help maintain stable operating temperature, which is important for consistent heater performance, emissions control, and overall cooling system balance.

This part cross-references Four Seasons 36698 for the same application.

What This Thermostat Helps Address

• Engine running too cool or too warm due to thermostat wear
• Temperature fluctuation during normal driving
• Cooling system service on 180°F OE-temperature applications
• Leak concerns at the thermostat sealing surface
• Replacement needs on high-mileage Buick, Chevrolet, GMC, Pontiac, Saturn, and Saab models

Installation Notes and Fitment

Compatible With 2015-2017 Buick Regal, N/A; 2015-2017 Buick Verano, N/A; 2016-2017 Chevrolet Equinox, N/A; 2010-2012 Chevrolet Equinox, N/A; 2010-2017 GMC Terrain, N/A; 2015-2016 Buick LaCrosse, N/A; 2012-2015 Buick Verano, N/A; 2014 Buick LaCrosse, N/A; 2010-2012 Buick LaCrosse, N/A; 2011-2014 Buick Regal, N/A; 2012 Chevrolet Captiva Sport, N/A; 2008-2010 Chevrolet Captiva Sport, N/A; 2004-2012 Chevrolet Malibu, N/A; 2006-2011 Chevrolet HHR, N/A; 2005-2011 Saab 9-3, N/A; 2010-2011 Saab 9-3X, N/A; 2011 Saab 9-5, N/A; 2009 Saab 9-5, N/A; 2005-2010 Chevrolet Cobalt, N/A; 2006-2010 Pontiac G6, N/A; 2007-2009 Pontiac G5, N/A; 2006-2009 Pontiac Solstice, N/A; 2007-2009 Saturn Aura, N/A; 2007-2009 Saturn Sky, N/A; 2002-2009 Saturn Vue, N/A; 2003-2007 Saturn Ion, N/A; 2006 Pontiac G4, N/A; 2005-2006 Pontiac Pursuit, N/A; 2002-2005 Chevrolet Cavalier, N/A; 2004-2005 Chevrolet Classic, N/A; 2002-2005 Pontiac Grand Am, N/A; 2002-2005 Pontiac Sunfire, N/A; 2002-2004 Oldsmobile Alero, N/A; 2004 Saturn L300, N/A; 2001-2003 Saturn L200, N/A; 2001-2003 Saturn LW200, N/A; 2001-2002 Saturn L100, N/A; 2000 Saturn LS, N/A; 2000 Saturn LS1, N/A; 2000 Saturn LW1, N/A.

Before installation, verify the thermostat housing condition and clean the sealing surfaces to support proper O-ring seating. Confirm the 180°F OE-temperature specification matches the vehicle’s cooling system requirements before replacing the thermostat.

Quality Assurance

Gates OE Type Thermostats are built to deliver precise temperature control with OEM-equivalent fit and leak-resistant sealing. The 33943 is an OE-style replacement engineered for consistent service in the listed Buick, Chevrolet, GMC, Pontiac, Saturn, and Saab applications.