MOTOKU Front & Rear Thermostats (185°/180°) for Duramax 6.6 Chevy/GMC

Overview

The MOTOKU front and rear thermostat set is crafted for Duramax 6.6 diesel engines, aligned with a broad range of Chevy and GMC models. This dual-thermostat kit features distinct operating temperatures of 185° and 180°, designed to support steady cooling performance across varying driving conditions.

Why choose this thermostat set?

Engineered for durable duty, the pair provides a reliable replacement option that mirrors the temperature ranges found in many factory setups. The design emphasizes precise fit and consistent operation, offering a practical upgrade for Duramax-powered trucks and vans without relying on heavy modification.

• Front thermostat configured for 185° to help regulate coolant flow during warm-up and steady-state operation.
• Rear thermostat configured for 180° to support balanced cooling and reduced thermal stress.
• Direct-fit compatibility with common Duramax installations for Chevy Silverado, Express, and GMC lineups.
• Sturdy construction intended for long service life in demanding engine environments.

Compatibility at a glance

• Chevy Silverado 2500HD (2001–2018) and Silverado 3500 (2001–2006)
• Chevy Express 2500 (2006–2016) and Express 3500 (2006–2016)
• GMC Sierra 2500HD (2001–2018) and Sierra 3500 (2001–2006)
• GMC Sierra 3500HD (2007–2018)
• GMC Savana 2500 (2006–2016) and Savana 3500 (2006–2016)

Real-world use and benefits

In everyday use, this kit can support reliable engine behavior across warm-up, highway cruising, and load conditions. While performance can vary by vehicle and operating environment, users may notice more predictable temperature management and a smoother cooling cycle with proper installation.

The accompanying front and rear thermostats are designed as a straightforward replacement option for Duramax-driven Chevy and GMC applications, helping you restore or maintain intended cooling performance with minimal disruption to routine maintenance schedules.

What’s included and installation notes

• Front thermostat (185°) and rear thermostat (180°) for Duramax engines
• Direct-fit parts intended to align with factory mounting points

For best results, follow your vehicle service manual or consult a qualified technician during replacement. Ensure the engine is cool and the cooling system is depressurized before handling components.