Derale Performance 68843 Severe Duty Cooling Kit for 1999-2014 GM Trucks & SUVs

The Derale Performance 68843 Severe Duty Cooling Kit is a comprehensive, installation-ready cooling upgrade engineered for GM trucks and SUVs that operate under demanding conditions. This all-in-one kit replaces the factory cooling system with higher-capacity components designed to handle towing, hauling, off-road use, and other high-demand applications where the stock system falls short.

What's Included:

• OSC Severe Duty Radiator — heavy-duty construction built for increased coolant capacity and superior heat rejection
• Dual High-Output Derale Electric Fans — deliver maximum airflow to keep engine temperatures in check under load
• Aluminum Fan Shroud — precision-engineered to maximize airflow efficiency across the radiator core
• PWM (Pulse Width Modulation) Fan Controller — continuously monitors engine temperature and adjusts fan speed from 0–100% to maintain optimal operating temperature, eliminating constant on/off cycling and harmful amperage spikes

Key Features:

• Complete bolt-in cooling system upgrade — everything needed in one kit
• PWM Soft Start Technology ramps fans up gradually, reducing electrical stress and extending component life
• Greater cooling capacity compared to OEM systems
• Aluminum shroud construction is compatible with polishing, painting, or anodizing
• Designed for towing, hauling, and severe-duty applications

Compatible with Chevy Silverado, Suburban, Tahoe, Avalanche, GMC Sierra, Yukon, and Hummer H2 models from 1999–2014. The Derale 68843 delivers a complete, high-performance cooling solution in a single package — no piecing together components.