One Stop Solutions 622 Radiator

Radiator for GMC and Chevrolet Trucks

OSC Premium New Automotive Radiator Part Number 622 is built for OE-style form and function in a crossflow layout. It is designed for vehicles that use an engine oil cooler and transmission oil cooler, with a 28 1/4-inch core height and 1-1/4-inch core thickness for direct replacement service.

Compatible With 1988-1995 Chevrolet C1500, 1988-1995 Chevrolet C2500, 1988-1995 Chevrolet K1500, 1988-1995 Chevrolet K2500, 1988-1994 Chevrolet C3500, 1988-1994 Chevrolet K3500, 1988-1995 GMC C1500, 1988-1995 GMC C2500, 1988-1995 GMC K1500, 1988-1995 GMC K2500, 1988-1994 GMC C3500, 1988-1994 GMC K3500, 1992-1993 Chevrolet C1500 Suburban, 1992-1993 Chevrolet C2500 Suburban, 1992-1993 Chevrolet K1500 Suburban, 1992-1993 Chevrolet K2500 Suburban, 1992-1993 GMC C1500 Suburban, 1992-1993 GMC C2500 Suburban, 1992-1993 GMC K1500 Suburban, 1992-1993 GMC K2500 Suburban, and 1996-1997 GMC P3500.

• Part Number 622 radiator with OE-style fit and function
• Crossflow design with plastic tanks and PA core material
• Core dimensions: 28 1/4 in. height, 17 1/4 in. width, 1-1/4 in. thickness
• Transmission oil cooler included; engine oil cooler included
• Inlet diameter 1 5/16 in.; outlet diameter 1 9/16 in.
• Pressure tested during production for leak verification
• Factory-spec component fitment with plated cooler construction

Built for Cooling System Replacement

This OSC radiator is engineered for Chevrolet C1500, C2500, K1500, K2500, C3500, K3500, GMC C1500, C2500, K1500, K2500, C3500, K3500, Suburban applications, and GMC P3500 coverage listed above. The radiator uses premium-grade tubes, fins, headers, tanks, and related components, with design updates aimed at addressing common wear points in higher-mileage trucks. The unit is individually pressure tested and assembled to factory specifications for a direct replacement profile. This part cross-references Spectra Premium CU622 and Four Seasons 20348 for the same application.

Common Problems This Radiator Can Address

• Coolant leaks from a worn or damaged radiator core or tank
• Overheating caused by reduced heat transfer efficiency
• Transmission fluid temperature issues tied to a failing cooler circuit
• Engine oil cooling concerns on vehicles equipped with an oil cooler
• Fitment problems from an incorrect replacement radiator

Installation Notes

Verify core size, inlet and outlet diameters, and cooler configuration before installation. This radiator is a drop-in style replacement for the listed Chevrolet and GMC applications, and the included fittings or hardware support installation where required by the vehicle configuration. Confirm that the vehicle uses the noted engine oil cooler and transmission oil cooler setup before ordering. Part Number 622 is intended for direct replacement service on the listed fitments.

Quality Assurance

OSC tests the transmission and engine oil coolers before they are installed into the tank, checks the radiator core before assembly, and tests the completed unit again after assembly. The design uses cadmium-plated tubes and a die-cut gasket to help reduce premature failure and leakage concerns. Part Number 622 is built to OE-style cooler design standards for the listed Chevrolet and GMC truck and Suburban applications.