Keystone GM3010531 OEM Replacement Radiator 6.6L Diesel with Transmission Cooler

The Keystone GM3010531 is an OEM-replacement radiator engineered for the 6.6L Duramax turbocharged diesel engine. Built to match original factory specifications, this radiator features a 2-row aluminum core paired with plastic tanks for a direct, no-modification installation. It includes an integrated transmission oil cooler (TOC) and is designed with a top-left inlet and bottom-right outlet to match the OE configuration.

Key Features:

• 2-Row Aluminum Core with plastic tanks for OE-spec heat dissipation
• Integrated Transmission Oil Cooler (TOC) — no engine oil cooler included
• Core Dimensions: 34 in. x 25.31 in. x 2.25 in.
• Inlet: Top-left | Outlet: Bottom-right
• Direct bolt-on replacement — no drilling or modification required
• Designed for automatic transmission applications

OEM & Cross-Reference Part Numbers:

• Partslink: GM3010531
• OEM: 15914079
• Also cross-references: CU2857

This radiator is a quality replacement for the 6.6L V8 turbocharged diesel Duramax (LBZ/LMM) engine found in Silverado HD and Sierra HD trucks from 2006–2010, restoring proper engine cooling and transmission fluid temperature management.