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Mechman 2008-2025 GM Truck & SUV 400A Alternator

Original price was: $549.00.Current price is: $109.80.

SKU: 14019400 Category:

Description

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.

Installation Notes

Drive Belt

This unit comes with a smaller 1.75″ diameter pulley and will require a slightly shorter drive belt for proper belt tension.  Not recommended for sustained use above 5,000 RPM.  If you DO NOT use the correct shorter belt, this will result in very low to no output and create extra work load for the alternator.

RVC Bypass

This alternator uses the more robust 4 pin style regulator than the OE 2 pin ECU controlled system.  There is no extreme voltage fluctuation as this will bypass the RFC charging system in all truck & SUV applications.  Simply install the 1 wire P101 harness to a verified 12V switched source and plug in the included P103 module into the connector which originally plugged into the alternator.  No check battery light, no computer controlled voltage swings.  The voltage you want, when you want it!

Fitment Guide

Cadillac Escalade – 6.2L,  2014 – 2019
Chevrolet Silverado 1500 / 2500HD / 3500HD – All Gas Engines, 2014 – 2025
Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax, , 2007.5 – 2025
Chevrolet Suburban – All Gas Engines, 2014 – 2025
Chevrolet Tahoe – All Gas Engines, 2014 – 2025

GMC Sierra 1500 / 2500HD / 3500HD – All Gas Engines, 2014 – 2025
GMC Sierra 2500HD / 3500HD – 6.6L Duramax, 2008 – 2025
GMC Yukon – All Gas Engines, 2014 – 2025

Learning Center

We have two excellent articles in our Learning Center that you may find invaluable:

High Output Alternators 101 – What You Need to Know

Charging Systems 101 – Learn the Facts and Become the Expert

Upgrade Options