Dorman 621-105 Engine Cooling Fan Blade

Overview of Dorman Engine Cooling Fan Blade 621-105

The Dorman 621-105 engine cooling fan blade is designed for reliable cooling performance in heavy-duty Chevrolet and GMC trucks. This steel fan blade features a 5-blade design with a 535 mm diameter, engineered to maintain optimal engine temperature under demanding conditions.

• 5 steel blades for effective airflow
• 535 mm blade diameter for heavy-duty cooling
• Durable black finish for corrosion resistance
• Standard replacement grade for dependable performance
• Compatible with select Chevrolet and GMC 2500 and 3500 series trucks

Detailed Product Description

The Dorman 621-105 engine cooling fan blade is constructed from steel, providing strength and durability necessary for heavy-duty applications. Its 5-blade configuration and 535 mm diameter are optimized to deliver consistent airflow, helping to regulate engine temperature in Chevrolet Avalanche 2500, GMC Sierra 2500 HD, Sierra 3500, Silverado 2500 HD, Silverado 3500, Suburban 2500, and Yukon XL 2500 models. The black finish offers protection against rust and wear, extending the service life of the fan blade. This part is a standard replacement, designed to meet OEM specifications without including mounting hardware.

Compatible Vehicles and Applications

• Chevrolet Avalanche 2500
• GMC Sierra 2500 HD and Sierra 2500 HD Classic
• GMC Sierra 3500 and Sierra 3500 Classic
• Chevrolet Silverado 2500 HD and Silverado 2500 HD Classic
• Chevrolet Silverado 3500 and Silverado 3500 Classic
• Chevrolet Suburban 2500
• GMC Yukon XL 2500

Common Issues Addressed by This Cooling Fan Blade

• Overheating due to damaged or worn fan blades
• Reduced engine cooling efficiency from bent or cracked blades
• Excessive engine temperature fluctuations during heavy load
• Noise or vibration caused by imbalanced fan blades
• Corrosion-related blade failure in older cooling fans

Installation Notes and Tips

Installation of the Dorman 621-105 engine cooling fan blade requires removal of the existing fan blade assembly. Note that mounting hardware is not included, so retain or replace bolts and fasteners as needed. Ensure the fan blade is properly aligned and securely fastened to avoid imbalance and vibration. It is recommended to inspect the fan clutch and motor during installation to confirm overall cooling system integrity.

Quality Assurance and Warranty

Dorman engine cooling fan blades are manufactured to meet or exceed OEM standards for fit, form, and function. The 621-105 part is a standard replacement grade component backed by Dorman's quality control processes. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship to provide confidence in product reliability.