Keystone GM4050118 Transmission Oil Cooler 6.0L 23x3 In. OEM Replacement

The Keystone GM4050118 is an OEM-replacement external transmission oil cooler designed for 2011–2014 Chevrolet Silverado 2500 and 3500 HD trucks equipped with the 6.0L gasoline engine. Built to match the form, fit, and function of the original equipment unit, this cooler helps regulate automatic transmission fluid temperature to protect against heat-related wear and premature transmission failure.

Key Features:

• Direct OEM replacement — engineered to match original specifications for a hassle-free installation
• Core dimensions: 23 x 3 inches for effective heat dissipation
• Designed to maintain proper automatic transmission fluid (ATF) operating temperature under towing, hauling, and heavy-duty use conditions
• External auxiliary cooler design supplements the factory radiator-integrated cooler for added thermal protection
• Manufactured to strict quality and dimensional standards for reliable, long-term performance

OEM & Cross-Reference Part Numbers:

• Keystone MPN: GM4050118
• GM OEM Part Number: 25874229
• Also cross-references: REPC311110

This transmission oil cooler is the correct OEM-style replacement for Silverado 2500/3500 HD work trucks that demand dependable thermal management — whether used for daily driving, fleet service, or heavy towing applications.