Dayco 72270 Radiator Coolant Hose - Lower

Dayco 72270 Curved Radiator Hose Overview

Dayco 72270 is a branched lower radiator coolant hose built for specific Chevrolet Silverado 1500 and GMC Sierra 1500 applications. It uses EPDM construction and follows SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for cooling-system service.

This curved radiator hose is shaped for lower cooling-system routing on select 2005-2013 Chevrolet Silverado 1500 and GMC Sierra 1500 models, including Classic applications. The branched design and molded dimensions support the factory-style hose path used in these trucks.

Key Features

• EPDM rubber construction for coolant-system durability
• Black finish with molded curved and branched hose layout
• Lower radiator hose application for select GM trucks
• End inside diameters: 1 1/2 in., 1 3/4 in., and 1 in.
• Trunk height: 21 3/4 in.
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC requirements
• Dayco 72270 cross-references ACDelco 26545X and Gates 23130

Detailed Description

Dayco 72270 is a Curved Radiator Hose from Dayco’s Curved Radiator Hose line, engineered for lower coolant routing on select Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. The branched hose layout matches the factory-style T-shaped routing used on many of these applications, helping maintain proper coolant flow between the radiator and engine cooling circuit. If you are replacing a worn lower hose on a 2006-2013 Chevrolet Silverado 1500 or a 2007-2013 GMC Sierra 1500, this part number is built for that application family. It also covers 2005-2006 GMC Sierra 1500 and 2005 Chevrolet Silverado 1500 lower hose applications, plus 2007 Silverado 1500 Classic and Sierra 1500 Classic models.

Dayco 72270 is a direct-fit style replacement for the listed vehicles and is commonly searched as a lower radiator hose for Chevrolet Silverado 1500, GMC Sierra 1500, and related Classic models. The EPDM material is suited for hot coolant exposure, while the molded shape helps preserve the intended hose routing. This part number is also known under interchange references such as ACDelco 26545X and Gates 23130.

What This Hose Helps Address

• Coolant leaks from a cracked or aged lower radiator hose
• Softening, swelling, or collapse of the original hose
• Improper hose routing caused by a damaged molded hose
• Cooling-system service on Chevrolet Silverado 1500 and GMC Sierra 1500 trucks
• Replacement of a branched T-shaped lower radiator hose assembly

Installation Notes and Tips

• Verify the vehicle year, make, model, and lower hose routing before ordering.
• Inspect hose clamps, radiator necks, and engine fittings for wear or corrosion during replacement.
• Confirm the end diameters and molded shape match the original hose before installation.
• Drain coolant as needed and refill the system according to the vehicle service procedure.

Quality Assurance

Dayco 72270 is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for radiator hose service. It is a fitment-specific cooling-system part for the listed Chevrolet Silverado 1500 and GMC Sierra 1500 applications.