Mechman high output alternators · Authorized dealer

Chevrolet Trailblazer High Output Alternators

Inline-six or V8, the Trailblazer is a lot of SUV, and owners load it accordingly. Subwoofers in the cargo area, light bars on the roof and a hitch out back all lean on the charging system. This page lists every Chevrolet Trailblazer high output alternator Mechman offers for 2002-2009 models with the 4.2L, 5.3L or 6.0L. Filter by amperage, finish and housing.

  • 46 products
  • 2002–2009
  • 170–400 Amp
  • Billet options
All Chevrolet alternators

46 products

Six or Eight: Start With Your Engine

The Trailblazer is one of the trickier GM SUVs to shop for, because both engine and year change the answer. Coverage falls into four groups, and the finder at the top of the page will place your truck in the right one. The 4.2L inline-six is split at 2007: 2002-2006 trucks use a unit with a 4-pin plug, and 2007-2009 trucks use one with a 2-pin plug. The 5.3L V8 from 2003-2006 takes a different family, and the 2007-2009 5.3L and 6.0L share another. Check your year, engine and plug before you pick a Trailblazer high output alternator.

From Daily Driver to SS Sound Build

The 6.0L SS draws a performance crowd, and those owners tend to go big on audio as well. Six-cylinder trucks are more often family haulers with a stereo upgrade and some towing. Mechman high output alternators for the Trailblazer come in 170, 240, 250, 320, 370 and 400 Amp, so there is a sensible fit either way.

  • 170 Amp: a daily driver with one small amplifier.
  • 240 or 250 Amp: a 2,000 W system, or towing with trailer lights and a brake controller.
  • 320 or 370 Amp: multiple amps, a light bar and a compressor on a weekend trail truck.
  • 400 Amp: a dedicated SPL build in an SS or other V8 truck.

Billet housings are machined from solid aluminum, with finishes such as Orange, Blue and Machined. Standard cast housings are listed for a stock look. Whatever the output, a Trailblazer high output alternator pairs well with a Big 3 upgrade from our amp wiring kits and a strong battery from our battery collection. GMC Envoy owners have their own page, and the GM alternator collection lists the rest.