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Mechman high output alternators · Authorized dealer
The GMC S-15 is the compact pickup people keep for decades: a hauler for the dump run, a commuter, a first truck handed down. Keeping it on the road means a charging system that can handle whatever got added along the way. This page lists every GMC S-15 high output alternator Mechman offers for 1988-1995 4.3L trucks and 1994-2003 2.2L trucks.
Most S-15s are not show trucks. They carry tools, tow a small utility trailer and wear a set of work lights. Add a better stereo for the commute and the original charging system starts to struggle at idle. A GMC S-15 high output alternator restores headroom without turning the truck into a project.
Choose your year and engine in the finder above and your truck lands in one of two groups. The 4.3L V6 from 1988 to 1995 uses one alternator family. The 2.2L four-cylinder from 1994 to 2003 uses a dedicated unit. Match your engine first, because the two take different alternators.
Mechman high output alternators for the S-15 are listed at 170, 240, 250, 320, 370 and 400 Amp. For most owners, the lower end is the right call.
Both billet and standard cast housings are offered. Billet is machined from solid aluminum, with finishes including Red, Dark Blue and Chrome. Cast keeps the bay looking stock, which suits most S-15 owners. An S-15 high output alternator and a healthy battery work as a pair, so check our batteries if yours is getting old. Chevrolet's version of this truck has its own S-10 page, and Buick Roadmaster owners have a separate page that shares several of these units. The Chevrolet and GMC alternator collection covers more trucks.
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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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