370 Amp RVC Bypass Alternator - 2007-2013 6.6L Duramax LMM/LML & 2005-2013 GM Gas - Black Billet

370 Amp High Output Alternator for 2007-2013 6.6L Duramax LMM/LML

Fits the 6.6L Duramax in 2007-2013 Chevrolet and GMC HD trucks (LMM and early LML) and the 2005-2013 GM gas trucks that share the same case and mount. 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 370+ 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

Vehicles: Silverado Sierra 2500HD 3500HD, Suburban, Tahoe, Escalade, Avalanche

Manufacturer specifications and full fitment

E Series

Newly redesigned for 2020, The Elite series offers the highest possible amperage and durability available in a large case alternator. 6 phase technology combined with massive twin rectifier assemblies and 12 diodes makes these alternators totally durable for daily use, while still maintaining 200+ amps at engine idle speeds. Some models are available with adjustable voltage, ask a sales rep for more details.

Installation Notes:

This unit comes equipped with a smaller 1.75 inch diamter alternator pulley, and will require a slightly shorter drive belt for proper belt tension.  Not reccomended for use above 5,000 RPM engine speed.

*** THESE ARE NOT COMPATIBLE WITH EXTERNAL REGULATORS. YOU MUST REQUEST EXTERNAL REGULATION WHEN ORDERING. ***