Gates 21204 Radiator Coolant Hose - Upper

Overview of Gates Molded Coolant Hose 21204

The Gates Molded Coolant Hose 21204 is engineered for reliable cooling system performance in select Buick, Chevrolet, GMC, Oldsmobile, and Pontiac vehicles. Designed with durable EPDM and plastic materials, this radiator coolant hose ensures proper coolant flow and system integrity.

• Constructed from EPDM and plastic for heat and chemical resistance
• Molded design for precise fit and leak prevention
• End 1 inside diameter: 1.25 inches (32 mm)
• End 2 inside diameter: 1.5 inches (38 mm)
• Centerline length: 30.8 inches (782 mm)
• Contains no spring or quick connect fittings
• Compatible with multiple GM truck and car models

Detailed Product Description

This radiator coolant hose from the Gates Molded Coolant Hose line is specifically molded to match the original equipment specifications for a range of GM vehicles including the Chevrolet C10, GMC Sierra, Buick Century, Pontiac Firebird, and others. The hose features a molded construction that eliminates the need for modular assembly, reducing potential leak points. Made from EPDM rubber combined with plastic components, it offers resistance to heat, ozone, and coolant chemicals, which helps maintain durability under demanding engine conditions. The hose’s two ends have different inside diameters—1.25 inches (32 mm) on one end and 1.5 inches (38 mm) on the other—allowing for proper connection to the radiator and engine fittings. With a centerline length of 30.8 inches (782 mm), it fits the cooling system layout of various GM trucks and passenger cars.

Compatible Vehicles and Applications

• Buick models such as Century, LeSabre, and Regal
• Chevrolet trucks including C10, C1500, and Silverado series
• GMC trucks like Sierra 1500, 2500, and 3500
• Oldsmobile and Pontiac models including Cutlass, Firebird, and Grand Prix
• Designed for radiator coolant flow and system sealing in these vehicles

Installation Notes and Tips

• Ensure the cooling system is cool before removal to avoid burns
• Inspect hose ends and clamps for corrosion or damage before installation
• Use proper clamps to secure the hose ends and prevent leaks
• Verify hose routing matches original equipment to avoid kinks or interference
• Check coolant levels and pressure test the system after installation

Quality Assurance and Warranty

The Gates Molded Coolant Hose 21204 is manufactured to meet or exceed OEM standards for fit, form, and function. Gates is a recognized supplier of automotive cooling components, ensuring consistent quality and durability. While specific warranty details are not provided here, Gates products typically come with a limited warranty against defects in material and workmanship. For exact warranty terms, consult the product documentation or manufacturer.