185°F & 180°F Thermostat Front & Rear Kit Pair Fit GM Pickup Duramax GMC 6.6L

185°F & 180°F Thermostat Front & Rear Kit Pair Fit GM Pickup Duramax GMC 6.6L

$43.99
Sale price  $43.99 Regular price 
Skip to product information
185°F & 180°F Thermostat Front & Rear Kit Pair Fit GM Pickup Duramax GMC 6.6L

185°F & 180°F Thermostat Front & Rear Kit Pair Fit GM Pickup Duramax GMC 6.6L

SKU: ZZ3F02657
$43.99 In Stock
$43.99
Sale price  $43.99 Regular price 
Same day shipping if ordered by 4PM CST.
Part Number(s)
Estimated delivery between
Industrial Retailer parts support representative

Let Northline Parts Do the Heavy Lifting for You!

Not sure which part you need? Our team can help you find the right replacement.

Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT

Live Chat: Available 24/7

I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model

185°F & 180°F Thermostat Front & Rear Kit Pair for GM Pickup Duramax GMC 6.6L

This 185°F and 180°F thermostat front and rear kit pair is a matched set for GM pickup and GMC Duramax 6.6L diesel engines, providing both thermostats for complete coolant flow control.

Overview

This thermostat front and rear kit pair includes one 185°F and one 180°F thermostat, the correct combination for Duramax 6.6L engines in GM pickups and GMC trucks. It allows the engine to reach optimal operating temperature quickly and maintain stable heat under load, making it a reliable direct replacement for worn factory units.

Built For Performance

  • Matched 185°F and 180°F opening temperatures for proper Duramax cooling system flow
  • Includes both front and rear thermostats in one convenient kit pair
  • High-quality construction resists sticking and corrosion
  • Engineered for consistent performance across heavy-duty driving conditions
  • Drop-in replacement for GM pickup and GMC 6.6L diesel applications

Fits These Machines

  • for GM Pickup Duramax 6.6L
  • for GMC Sierra Duramax 6.6L
  • for Chevrolet Silverado Duramax 6.6L

On-The-Job Use

  • Ideal for routine cooling system service on towing and hauling vehicles
  • Works in extreme hot or cold environments where thermostat response is critical
  • Replaces both thermostats at once to ensure balanced coolant circulation

Specs At A Glance

Part Number(s) Front and rear kit pair
Opening Temperature 185°F (front), 180°F (rear)
Type Thermostat kit pair
Engine Duramax 6.6L V8

Good To Know

Q: What is the benefit of different temperature thermostats in the front and rear? A: The Duramax 6.6L uses a 185°F front thermostat and 180°F rear thermostat to manage coolant flow across the engine block, preventing hot spots and ensuring even warm-up.

Q: Can I use this kit pair for a daily driver as well as a work truck? A: Yes, it performs well in both daily driving and heavy-duty applications, keeping the engine at a consistent temperature in any condition.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.

Customers also purchased