Gates CO34774 Engine Coolant Water Outlet

Gates Coolant Outlet CO34774 Overview

The Gates CO34774 coolant outlet is a cast aluminum engine coolant water outlet built for direct replacement service on select GM trucks, SUVs, and vans. It is engineered to match original fit and function while addressing common aftermarket material and design concerns.

Compatible With 1996-2002 Chevrolet Express 1500, 1996-2002 Chevrolet Express 2500, 1996-2002 Chevrolet Express 3500, 1996-2002 GMC Savana 1500, 1996-2002 GMC Savana 2500, 1996-2002 GMC Savana 3500, 1999-2000 Cadillac Escalade, and other listed Chevrolet and GMC applications.

• Cast aluminum construction for durable cooling-system service
• Engine coolant water outlet / coolant outlet design
• Outlet inside diameter: 1.016 in.
• Outlet outside diameter: 1.309 in.
• 2 bolt holes for mounting
• Includes gasket
• OE-style fit and performance for listed applications

Gates Coolant Outlet Line Details

Gates Coolant Outlet products are part of a focused cooling-system line that covers water outlets through complete thermostat housing assemblies. The CO34774 follows that approach with a replacement coolant outlet designed to install in the same location and function as the original part on supported Chevrolet Express, GMC Savana, Cadillac Escalade, Chevrolet Tahoe, GMC Yukon, and related GM platforms. This part number, CO34774, is a practical choice when replacing a leaking or corroded coolant outlet on 1996-2002 GM applications.

This part cross-references Dorman - OE Solutions 902-754 and Motorad CH5169 for the same application.

Common Replacement Reasons

• Coolant seepage at the outlet or gasket surface
• Corrosion or pitting in the original aluminum housing
• Cracked or warped coolant outlet flange
• Improper sealing at the engine coolant hose connection
• Cooling-system service on a high-mileage GM truck, van, or SUV

Installation Notes

Verify hose diameter, bolt-hole alignment, and gasket surface condition before installation. Clean the mating surfaces thoroughly and inspect the coolant hose and adjacent thermostat housing components for wear. Confirm vehicle application by year, make, and model before ordering CO34774.

Fits 1996-2002 Chevrolet Express 1500, N/A; Fits 1996-2002 Chevrolet Express 2500, N/A; Fits 1996-2002 Chevrolet Express 3500, N/A; Fits 1996-2002 GMC Savana 1500, N/A; Fits 1996-2002 GMC Savana 2500, N/A; Fits 1996-2002 GMC Savana 3500, N/A; Fits 1999-2000 Cadillac Escalade, N/A; Fits 1996-2000 Chevrolet C2500, N/A; Fits 1996-2000 Chevrolet C35, N/A; Fits 1996-2000 Chevrolet C3500, N/A; Fits 1996-2000 Chevrolet K2500, N/A; Fits 1996-2000 Chevrolet K3500, N/A; Fits 1996-2000 Chevrolet Tahoe, N/A; Fits 1996-2000 GMC C2500, N/A; Fits 1996-2000 GMC C3500, N/A; Fits 1996-2000 GMC K2500, N/A; Fits 1996-2000 GMC K3500, N/A; Fits 1998-2000 GMC Yukon, N/A; Fits 1996 GMC Yukon, N/A; Fits 1996-1999 Chevrolet C1500, N/A; Fits 1996-1999 Chevrolet C1500 Suburban, N/A; Fits 1996-1999 Chevrolet C2500 Suburban, N/A; Fits 1996-1999 Chevrolet K1500, N/A; Fits 1996-1999 Chevrolet K1500 Suburban, N/A; Fits 1996-1999 Chevrolet K2500 Suburban, N/A; Fits 1996-1999 Chevrolet Suburban 1500, N/A; Fits 1996-1999 GMC C1500, N/A; Fits 1996-1999 GMC C1500 Suburban, N/A; Fits 1996-1999 GMC C2500 Suburban, N/A; Fits 1996-1999 GMC K1500, N/A; Fits 1996-1999 GMC K1500 Suburban, N/A; Fits 1996-1999 GMC K2500 Suburban, N/A

Quality Assurance

Gates positions this coolant outlet as a cost-effective replacement that addresses common aftermarket material and manufacturing issues while maintaining OE-style fit and long service life. The cast aluminum construction and included gasket support reliable cooling-system repair on the listed GM applications.