2001-2010 Duramax Engine Coolant Thermostat Kit (10428)

Fits

Got a truck engine that isn't heating up or overheating? Often, the issue is faulty thermostats. Over time, thermostats can stick open or closed, causing heating or cooling issues. No worries! Just swap them out for new ones with this kit.

The thermostat at the front is situated in the forward location of the thermostat housing and is marked by its symmetrical appearance. It opens at 185°, giving way for coolant to move towards the radiator.

The rear position of the thermostat is found near the firewall. You can spot it by its offset design and it also has built-in bleeder valves. It opens at 180° to let coolant flow to the radiator.

Part Number: 10428

• Direct Replacement
• Helps Restore Cooling System Functionality
• All-Inclusive Kit
• Comes With Needed Seals
• Front & Rear Thermostat Included
• OEM Temperature Functionality

Included:

• Rear Thermostat
• Front Thermostat
• Oil Fill Tube Seal
• Upper Radiator Pipe Seal

Parts Only

• 1-Year Warranty

Symptoms Of Stuck Thermostat

When a thermostat becomes stuck, it can become stuck open or stuck closed, both producing opposite symptoms. Let’s take a look at what symptoms you may experience from each.

Thermostat stuck open - In the event that your thermostat is stuck open, coolant will always be flowing throughout your cooling system. This means that your truck will most likely take awhile if and when it reaches temperature. The thermostat is designed to stay closed until the coolant has reached operating temperature, then it opens to start cooling.

Thermostat stuck closed - A stuck thermostat will allow the truck to reach operating temperature, but will not open to allow for the coolant to flow through the cooling system. This will most likely result in an overheating issue that could drastically hurt your engine.