Radiators

Prevent dangerous engine overheating, increase your cooling capacity, and permanently eliminate leaking factory end tanks on your 2007.5–2010 Chevy Silverado or GMC Sierra 2500HD/3500HD with our selection of LMM Duramax radiators. The factory radiator equipped in the 6.6L LMM utilizes a standard aluminum core crimped to plastic end tanks. Over years of intense heat cycling, high cooling system pressures, and normal chassis flex, this plastic becomes incredibly brittle, inevitably leading to cracked tanks, separated crimps, and sudden, catastrophic coolant loss. When you are hauling a heavy trailer up a steep grade, a failing radiator is the fastest way to overheat and warp your cylinder heads. Upgrading to a high-performance, all-aluminum radiator permanently resolves this notorious design flaw. Featuring robust, TIG-welded aluminum end tanks that will never crack or separate, these upgraded radiators also utilize thicker cores to significantly increase fluid capacity and maximize heat dissipation, drastically lowering your operating temperatures. We supply premium heavy-duty drop-in radiators from trusted industry leaders like Mishimoto, PPE, XDP, and genuine GM. Browse our complete inventory of 6.6L LMM Duramax radiators below to bulletproof your cooling system and tow with absolute confidence.