400 Amp High Output Alternator 1996-2004 GM Truck BLUE 4.3 4.8 5.3 5.7 6.0-8206400-blue

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The Elite series 400 amp alternator offers great amperage output and durability at a great price. 6 phase technology, combined with massive twin rectifier assemblies and 12 huge diodes make these alternators totally durable for daily use. These impressive alternators produce 220+ at engine idle RPM and 400+ amps at cruising speeds HOT RATED. Like most high output alternators, this unit comes with a smaller diameter pulley, and will require a 1/2 inch to one inch shorter than stock length belt for proper belt tension in most applications. Installation Notes: This unit may require an additional rectangle to oval adapter harness if the vehicle was originally equipped with the CS144 Heavy duty charging option from the factory. (this is not common) This unit is a direct plug in for any truck originally equipped with the more common oval shaped 4 pin plug as shown.

Fitment Guide:

Make Model Engine Size Year
Buick Rainier 5.3 2004 - 2006
Cadillac Escalade 5.7 / 6.0/ 6.2 1999 - 2004
Chevrolet Astro Van 4.3 1996 - 2005
Chevrolet Avalanche All Engines 2002 - 2004
Chevrolet Camaro 5.0/ 5.7 1998 - 2002
Chevrolet Express Van w/4 pin plug   1996 - 2016
Chevrolet Full Size Truck All Gas Engines 1996 - 2004
Chevrolet Full Size Truck 6.6 Duramax 2001 - 2007
Chevrolet S-10 / Blazer 4.3 1994 - 2004
Chevrolet SSR 5.3 / 6.0 2003 - 2006
Chevrolet Suburban w/4 pin plug 1996 - 2004
Chevrolet Tahoe/Full Size Blazer All Gas Engines 1996 - 2004
Chevrolet Trailblazer 5.3 2003 - 2006
GMC Envoy 5.3 2003 - 2006
GMC Full Size Truck / Sierra 4.3 1996 - 2004
GMC Full Size Truck / Sierra 4.8 1999 - 2004
GMC Full Size Truck / Sierra 5.0 1996 - 1999
GMC Full Size Truck / Sierra 5.3 1999 - 2004
GMC Full Size Truck / Sierra 5.7 1996 - 2000
GMC Full Size Truck / Sierra 6.0 1999 - 2005
GMC Full Size Truck / Sierra 6.6 Diesel 2001 - 2006
GMC Full Size Truck / Sierra 7.4 1996 - 2000
GMC Full Size Truck / Sierra 8.1 2001 - 2005
GMC Safari 4.3 1994 - 2004
GMC Savana Van w/ 4 pin oval plug 1996 - 2016
GMC Suburban w/ Oval plug 1996 - 2004
GMC Yukon w/ Oval plug 1996 - 2004
Hummer H2 6.0 2003 - 2007
Oldsmobile Bravada 4.3 1994 - 2001
Pontiac Firebird 5.0/ 5.7 1998 - 2002

2 year performance guarantee.

The MechMan two year warranty applies to Mechman Alternators sold ON or AFTER 07/13/2011. This limited two year warranty allows the customer to return his or her MechMan alternator for repair for a full two years after the alternator purchase date. This warranty does not cover other parts or equipment on the vehicle, and does not cover labor for removal or installation of the alternator. This warranty is VOID if the MechMan alternator is modified, physically abused, misused, improperly installed, or is not used in the application for which it was designed. The MechMan two year warranty is non-transferrable. The customer must include a copy of the original invoice when sending in their alternator in order to receive warranty service. The customer is responsible for shipping the alternator to the Mechman facility for warranty service, Mechman will pay return shipping back to the customer for all alternators under warranty. As an added service, MechMan will also service any MechMan alternator of any age or condition for the cost of parts and return shipping. (We provide the labor to repair the alternator for free!)

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  • 4
    Fantastic alt. Mechman 400

    Posted by Jacob Wyatt on Oct 8th 2021

    Absolutely fantastic alt. Color looks great. Does overrated amps. Easy to install and wire. My only complaint is how short the stud is on the back of the alternator. My singer 390 I didn’t need a distribution block. Not a big deal to order one but would definitely like to seen them a little longer stud. For a high quality alt you can’t go wrong with mechman. Down4sound side of things I called to see if they had it in stock. The lady went to check and told me they did and was very helpful. Shipping was excellent. Great customer service as always. Thank y’all.

  • 5
    400 amp gm alternator

    Posted by Stephen Martin on Nov 9th 2020

    Great experience and alternator exceeded my expectations. Shipped right away what else can you ask for!

  • 5
    400 amp blue

    Posted by Noel on May 30th 2020

    This thing is what I needed gave my System may boost an fit perfect in my GMC Yukon the color was a little off but that’s ok I still love it.