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Fits the 6.6L Duramax across the LMM, LML and L5P engines in Chevrolet and GMC HD trucks, and the 2014-2019 GM gas trucks and SUVs that share the same case and two-pin RVC plug. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.
Diesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 250+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.
Engine codes covered: LMM, LML, L5P
Vehicles: Silverado Sierra 2500HD 3500HD, Tahoe, Suburban, Yukon, Escalade
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