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Mechman high output alternators · Authorized dealer
From a 1965 Chevy restomod to a 2023 Silverado pushing a plow, GM has built just about every kind of vehicle people wire for serious power. This page gathers every GM high output alternator we carry for Chevrolet, GMC, Cadillac, Buick, Pontiac, Oldsmobile, Saturn and Hummer. Pick your model from the row below, or use the vehicle finder to narrow the grid to units that bolt straight on.
Full-size trucks and SUVs carry the deepest selection. Chevrolet Silverado high output alternators share a wide spread of options with GMC Sierra alternator upgrades, the Chevy Tahoe alternator page and Cadillac Escalade alternators. Diesel owners who tow or run auxiliary gear should head to the Silverado HD alternator page. Performance builders will find Camaro high output alternators for 1988-2002 and 2010-2015 cars. The range also covers Express and Savana vans built for camper and work upfits, S-10 and Blazer compacts, sedans like the Impala and Malibu, and classic 1965-1985 Chevrolets.
To find the right GM high output alternator, start with the vehicle finder or your model page, then match year and engine. GM changed alternator families several times, so a 1996-2004 truck and a 2005-2013 truck take different units, and Express and Savana vans split by 2-pin or 4-pin plug. On each model page, the vehicle finder at the top narrows the grid to the series that fits your year and engine.
Output runs from 170 Amp to 400 Amp, with 240, 250, 320 and 370 Amp in between. A 170 or 240 Amp unit suits a daily driver with one amplifier or a light bar. 320 and 370 Amp units cover multi-amp systems, winches and inverters. 400 Amp units are for competition audio and trucks stacking plow, lighting and upfitter loads.
Many GM units come in a billet housing machined from solid aluminum, which is rigid and sheds heat well on hard-working builds. Standard cast housings handle most moderate systems. Finish options include Black, Chrome, Polished, Red, Blue and Gold, so the alternator can match the engine bay.
Mechman high output alternators make the current, but the wiring has to carry it. Pair yours with Big 3 and amp wiring kits and a stronger battery from our battery collection. If your build needs a plug adapter or a different regulator, see alternator harnesses and regulators. Owners of 1999-2013 GM full-size trucks and SUVs who want two or three alternators can use our dual and triple bracket kits. To compare across makes, browse all alternators.
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Shop Pay Installments: Rates from 0-36% APR. Payment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. Snap: The advertised service is a lease-to-own agreement provided by Snap RTO LLC. Lease-to-own financing is not available to residents of Minnesota, New Jersey, and Wisconsin. ¹ Not all applicants are approved. While no credit history is required, Snap obtains information from consumer reporting agencies in connection with submitted applications, and your score with those agencies may be affected. Sezzle: Issued by WebBank or Sezzle. See loan agreement for details. Refurbished items are not eligible for financing or leasing.
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