Dorman 626-738 Radiator Coolant Hose - Lower

Durable Radiator Coolant Hose for GM Trucks and SUVs

The Dorman 626-738 radiator coolant hose is engineered to provide reliable cooling system performance for select Cadillac, Chevrolet, and GMC vehicles. Designed as a standard replacement part, this molded assembly hose ensures proper coolant flow and system integrity.

• Constructed from EPDM rubber, metal, and plastic materials for durability and heat resistance
• Black color with a protective sleeve attached for added abrasion protection
• Molded assembly hose shape with two branches for precise fitment
• Inside diameters: 40mm and 25mm ends, with a maximum working pressure of 100 psi
• Maximum bend angle of 90 degrees to accommodate engine bay routing
• Centerline length approximately 3627.86 mm for accurate replacement

Technical Details and Construction

The Dorman 626-738 radiator coolant hose features a molded assembly design that includes two branches, allowing it to fit complex coolant routing in vehicles such as the Cadillac Escalade, Chevrolet Silverado 1500, and GMC Yukon. The hose is made from EPDM rubber, known for its resistance to heat, ozone, and coolant chemicals, combined with metal and plastic components to maintain structural integrity. The black hose includes a protective sleeve to guard against abrasion and wear, extending the service life of the part. With inside diameters of 40mm and 25mm at the hose ends, this hose supports a maximum working pressure of 100 psi, suitable for standard cooling system requirements.

Compatible Vehicles and Applications

This radiator coolant hose is compatible with the following GM models:

• Cadillac Escalade and Escalade ESV
• Chevrolet Silverado 1500, Silverado 1500 LD
• GMC Sierra 1500, Sierra 1500 Limited
• Chevrolet Tahoe
• GMC Yukon and Yukon XL

It is designed to replace original equipment hoses that have failed due to wear, cracking, or leaks, ensuring proper coolant circulation and engine temperature regulation.

Common Issues Addressed by This Radiator Coolant Hose

• Coolant leaks caused by cracked or deteriorated hoses
• Overheating due to restricted or collapsed hoses
• Coolant contamination from hose material breakdown
• Loss of coolant pressure affecting engine cooling efficiency
• Hose damage from abrasion or improper fitment

Installation Notes and Tips

When installing the Dorman 626-738 radiator coolant hose, ensure the engine is cool to prevent burns. Verify hose routing matches the original configuration, paying attention to the molded assembly branches. Inspect hose clamps and replace if necessary to maintain a secure seal. The protective sleeve should be positioned to prevent contact with sharp edges or moving components. Proper installation will help maintain coolant system pressure and prevent leaks.

Quality Assurance and Warranty

Dorman manufactures this radiator coolant hose to meet or exceed OEM standards for fit, form, and function. The use of EPDM rubber and durable materials ensures resistance to heat and coolant chemicals. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in material and workmanship, supporting long-term reliability in your Cadillac Escalade, Chevrolet Silverado, or GMC Yukon cooling system.