Dorman 625-166 Engine Oil Cooler Hose Assembly - Inlet or Inlet (Upper)

Engine Oil Cooler Hose Assembly for OE-Style Repair

Dorman 625-166 is an engine oil cooler hose assembly built to match the fit and function of the original equipment line. It restores oil circulation between the oil cooler and engine on select Chevrolet and GMC trucks and SUVs, including Silverado, Sierra, Avalanche, Suburban, and Yukon XL applications.

With rubber and metal construction, quick disconnect ends, and a 61.8-inch length, this oil cooler line is made for direct replacement service where the original hose has leaked, cracked, or lost sealing performance. Dorman 625-166 is a practical choice for 2001-2003 Chevrolet Silverado 2500 HD and 3500 inlet applications, as well as other listed GM heavy-duty platforms.

Key Features

• Engine oil cooler hose assembly for oil circulation between the cooler and engine
• Rubber/metal construction for OE-style routing and durability
• 61.8-inch length
• Quick disconnect ends on both sides
• Natural finish
• Includes oil cooler line
• Dorman 625-166 replacement part number for direct lookup

Detailed Description

This Dorman oil cooler hose assembly is engineered to match the original equipment component used on select GM trucks and SUVs. It is designed for inlet-side service and uses quick disconnect fittings at both ends to simplify replacement on the specified applications. The rubber and metal construction supports the routing and connection style used in factory oil cooler plumbing, helping restore proper oil flow after a failed line has caused seepage, pressure loss, or contamination concerns. If you are sourcing a replacement for a Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, or GMC Sierra 2500 HD, Dorman 625-166 provides the correct OE-style configuration for the listed vehicles.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Fix

• Oil leaks at the cooler line connection
• Cracked or deteriorated hose material
• Restricted oil circulation between the engine and oil cooler
• Failed quick disconnect sealing surfaces
• Replacement needs on inlet-side oil cooler plumbing

Installation Notes and Tips

• Verify the vehicle tag and inlet position before ordering.
• Confirm the quick disconnect connection style matches the original line.
• Inspect mating fittings and seals for wear before installation.
• Route the hose to follow the factory path and avoid contact with hot or moving components.
• Use the listed fitment details for 2001-2003 Chevrolet and GMC heavy-duty applications, including Silverado, Sierra, Avalanche, Suburban, and Yukon XL models.

Quality Assurance

Dorman manufactures this hose assembly as an OE-style replacement for reliable repair and restoration of proper oil circulation. Part number 625-166 is built to match the original fit and function for the specified GM applications.