Keystone GM3010420 OEM Replacement Radiator – 6-Cylinder Aluminum Core with Transmission Cooler

The Keystone GM3010420 is a direct-fit OEM replacement radiator engineered to restore factory cooling performance. It replaces GM OEM part number 15196385 and is a drop-in replacement requiring no modifications for a straightforward installation.

This radiator features a single-row aluminum core with plastic end tanks, a downflow design, and an integrated automatic transmission oil cooler with quick-disconnect fittings — matching the original equipment configuration exactly. The aluminum core delivers efficient heat dissipation while the plastic tanks provide lightweight durability.

Key Specifications:

• Core Material: Aluminum
• Tank Material: Plastic
• Radiator Style: Downflow
• Number of Rows: 1
• Core Dimensions: 18 in. H x 26.63 in. W x 1 in. thick
• Inlet Diameter: 1.31 in. (top right)
• Outlet Diameter: 1.56 in. (bottom left)
• Transmission Cooler: Included (quick-disconnect connections)
• Engine Oil Cooler: Not included
• Fitment Type: Direct replacement

OEM & Interchange Part Numbers: 15196385, GM3010420, GM3010449, IZ3010147, CU2458, RAD2458, DPI 2458

Sold individually. This radiator is a reliable, cost-effective alternative to the dealer OEM unit, built to match original fit, form, and function for a straightforward, bolt-in repair.