Stant 14738 Engine Coolant Thermostat - Rear

OE Type Thermostat for Heavy-Duty GM Cooling Systems

Stant 14738 is an OE Type Engine Coolant Thermostat built for select Chevrolet, GMC, and Hummer applications. It uses an original equipment-style design with a 180 degree opening temperature, a durable construction, and a stainless steel assembly for smooth thermostat operation.

For drivers searching for a 180 degree thermostat for Chevrolet Silverado 2500 HD, GMC Sierra 3500 HD, or Chevrolet Express 3500 cooling service, this Stant OE Type Thermostat provides a direct-fit replacement option with seal included.

Key Features

• Part number 14738
• 180 degree Fahrenheit thermostat opening temperature
• OE Type Thermostat design for factory-style fit and function
• Durable material construction for long service life
• Stainless steel assembly engineered for smooth performance
• Seal included
• Compatible with rear thermostat applications and N/A position listings shown in fitment data

Product Details

Stant OE Type Thermostat 14738 is designed around original equipment dimensions and cooling-system requirements. The flange diameter measures 2.2 inches with or without the seal, the height from flange to bottom is 1.15 inches, and the height from flange to top of bridge is 0.6 inches. These specifications help support proper seating and consistent coolant temperature control in the intended applications.

This thermostat is listed for a wide range of heavy-duty Chevrolet and GMC trucks and vans, including Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, Sierra 3500 HD, Express 2500, Express 3500, Savana 2500, and Savana 3500. It is also listed for the 2006 Hummer H1. For buyers comparing Stant 14738 against OE-style cooling parts, the fitment coverage spans 2001-2020 model years across the listed vehicles.

This part cross-references 14728 for the same application.

What This Thermostat Helps Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuation caused by a worn thermostat
• Cooling-system service on high-mileage Chevrolet Silverado and GMC Sierra trucks
• Replacement needs for Chevrolet Express and GMC Savana van cooling systems
• Factory-style thermostat replacement for 180 degree applications

Installation Notes and Tips

Verify the thermostat housing, seal surface, and coolant passages before installation. Match the 180 degree temperature rating and confirm the rear or N/A fitment notes shown for your exact vehicle application. Use the listed dimensions to compare against the removed part before assembly.

After installation, refill and bleed the cooling system according to the vehicle service procedure, then check for leaks and confirm normal operating temperature.

Quality Assurance

Stant builds this OE Type Thermostat with an original equipment design and stainless steel assembly for consistent operation. The durable construction is intended to support long service life in demanding cooling-system applications.