Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401
Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401
Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401
Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401
Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401
Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401
Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401

Alternator for 5.0L, 5.7L Chevrolet C10, C15, C30 Pickup 1989-1995 400-12401

Item #: 400-12401

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DB Electrical alternators are highly engineered for excellence in performance.
  • Built to Beat the Heat: High temperature epoxy and high temperature grease withstand extreme heat
  • Heavy-duty rectifiers and high-quality regulators enhance superior charging performance
  • Most alternators are supplied with final test results and performance curve
  • Direct-fit replacement and easy installation made possible with OEM fitment specifications
  • Satisifed customers recently purchased: 1992 Corvette; 1994 Chevrolet C1500 Suburban
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  • Product Info
  • Applications List
  • Part Replacement List
  • Policy Information
  • Reviews

Overview

DB Electrical Alternators for Chevrolet and other GM Vehicles
DB Electrical offers premium-quality alternators that deliver high-performance for Chevrolet and other General Motors brands such as Buick, GMC, Pontiac and Oldsmobile. Owners of Chevy cars, trucks, vans and SUVs appreciate the highly engineered quality of DB Electrical alternators for flawless mechanical performance and longevity. Founded in 1911, Chevy has been a symbol of the American road for over a century. A DB Electrical alternator is a great choice for keeping your Chevrolet or other GM vehicle on the road. (Check our applications table below for specific makes and models for this alternator.)

With DB Electrical alternators, you'll get:

  • Superior Quality Every Time - Our aftermarket alternators deliver performance that's equivalent to the original.
  • Direct-Fit OEM Replacement Parts - DB Electrical aftermarket alternators are designed for perfect fitment to replace the ones that originally came with your vehicle.
  • Engineer-Tested Excellence - Our alternators go through a rigorous testing program to ensure optimal performance. Most alternators are supplied with their final test results and performance curve.

Reasons to choose DB Electrical for your next alternator:

  • Built to Take the Heat - Most DB Electrical alternators offer high-temperature epoxy, heavy-duty rectifiers, high-quality regulators, top-quality bearings and high-temperature grease produce better charging and longer life under high-heat environments.
  • Brand New Alternator - Never settle for a secondhand one. Many places will try to sell you a used alternator for about the price we'll sell you a new one.

The DB Electrical Advantage -Factory-Direct Pricing and 1-Year Warranty
DB Electrical sells its exceptional-quality electrical components at low factory-direct prices. DB Electrical delivers exceptional value for products that we stand behind with our total-confidence 1-year warranty. Yes, you have a full year to make sure your alternator meets your expectations.

Item Number: 400-12401

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Item ConditionAftermarket Part
Unit TypeAlternator
Part TypeUNIT
Voltage12
RotationCW
Amperage120
Pulley Class1255
RegulatorIR
Fan TypeEF
FitsCHEVROLET / GMC LT TRUCKS 7.4L 1989
6-GROOVE PULLEY 57mm OD

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
AM GeneralTruckHummer19955700cc 5.7L V8
AM GeneralTruckHummer19965700cc 5.7L V8
ChevroletAuto and Light TruckBLAZER1991350cu in 5.7L V8
ChevroletAuto and Light TruckBlazer19915700cc 5.7L V8
ChevroletTruckBlazer19915737cc 5.7L V8
ChevroletAuto and Light TruckBLAZER1992350cu in 5.7L V8
ChevroletAuto and Light TruckBlazer19925700cc 5.7L V8
ChevroletTruckBlazer19925737cc 5.7L V8
ChevroletAuto and Light TruckBLAZER1993350cu in 5.7L V8
ChevroletAuto and Light TruckBlazer19935700cc 5.7L V8
ChevroletTruckBlazer19935737cc 5.7L V8
ChevroletAuto and Light TruckBLAZER1994350cu in 5.7L V8
ChevroletAuto and Light TruckBlazer19945700cc 5.7L V8
ChevroletTruckBlazer19945737cc 5.7L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1989454cu in 7.4L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1990305cu in 5.0L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1991305cu in 5.0L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1991350cu in 5.7L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1992305cu in 5.0L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1992350cu in 5.7L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1993305cu in 5.0L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1993350cu in 5.7L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1994305cu in 5.0L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1994350cu in 5.7L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1995305cu in 5.0L V8
ChevroletAuto and Light TruckC / K / R / V SERIES PICKUPS1995350cu in 5.7L V8
ChevroletTruckC Series19897400cc 7.4L V8
ChevroletTruckC Series19905000cc 5.0L V8
ChevroletTruckC Series19915000cc 5.0L V8
ChevroletTruckC Series19915700cc 5.7L V8
ChevroletTruckC Series19925000cc 5.0L V8
ChevroletTruckC Series19925700cc 5.7L V8
ChevroletTruckC Series19935000cc 5.0L V8
ChevroletTruckC Series19935700cc 5.7L V8
ChevroletTruckC Series19945000cc 5.0L V8
ChevroletTruckC Series19945700cc 5.7L V8
ChevroletTruckC Series19955000cc 5.0L V8
ChevroletTruckC Series19955700cc 5.7L V8
ChevroletTruckC150019905000cc 5.0L V8
ChevroletTruckC150019915000cc 5.0L V8
ChevroletTruckC150019915700cc 5.7L V8
ChevroletTruckC150019925000cc 5.0L V8
ChevroletTruckC150019925700cc 5.7L V8
ChevroletTruckC150019935000cc 5.0L V8
ChevroletTruckC150019935700cc 5.7L V8
ChevroletTruckC150019945000cc 5.0L V8
ChevroletTruckC150019945700cc 5.7L V8
ChevroletTruckC150019955000cc 5.0L V8
ChevroletTruckC150019955700cc 5.7L V8
ChevroletTruckC1500 Suburban19925700cc 5.7L V8
ChevroletTruckC1500 Suburban19935700cc 5.7L V8
ChevroletTruckC1500 Suburban19945700cc 5.7L V8
ChevroletTruckC1500 Suburban19955700cc 5.7L V8
ChevroletTruckC250019905000cc 5.0L V8
ChevroletTruckC250019915000cc 5.0L V8
ChevroletTruckC250019915700cc 5.7L V8
ChevroletTruckC250019925000cc 5.0L V8
ChevroletTruckC250019925700cc 5.7L V8
ChevroletTruckC250019935000cc 5.0L V8
ChevroletTruckC250019935700cc 5.7L V8
ChevroletTruckC250019945000cc 5.0L V8
ChevroletTruckC250019945700cc 5.7L V8
ChevroletTruckC250019955000cc 5.0L V8
ChevroletTruckC250019955700cc 5.7L V8
ChevroletTruckC2500 Suburban19925700cc 5.7L V8
ChevroletTruckC2500 Suburban19935700cc 5.7L V8
ChevroletTruckC2500 Suburban19945700cc 5.7L V8
ChevroletTruckC2500 Suburban19955700cc 5.7L V8
ChevroletTruckC3519955700cc 5.7L V8
ChevroletTruckC350019897400cc 7.4L V8
ChevroletTruckC350019915700cc 5.7L V8
ChevroletTruckC350019925700cc 5.7L V8
ChevroletTruckC350019935700cc 5.7L V8
ChevroletTruckC350019945700cc 5.7L V8
ChevroletTruckC350019955700cc 5.7L V8
ChevroletTruckC3500HD19915700cc 5.7L V8
ChevroletTruckC3500HD19925700cc 5.7L V8
ChevroletTruckC3500HD19935700cc 5.7L V8
ChevroletTruckC3500HD19945700cc 5.7L V8
ChevroletTruckC3500HD19955700cc 5.7L V8
ChevroletAuto and Light TruckCORVETTE1992350cu in 5.7L V8
ChevroletAuto and Light TruckCorvette19925700cc 5.7L V8
ChevroletAuto and Light TruckCorvette19925736cc 5.7L V8
ChevroletAuto and Light TruckCORVETTE1993350cu in 5.7L V8
ChevroletAuto and Light TruckCorvette19935700cc 5.7L V8
ChevroletAuto and Light TruckCorvette19935736cc 5.7L V8
ChevroletTruckK Series19897400cc 7.4L V8
ChevroletTruckK Series19905000cc 5.0L V8
ChevroletTruckK Series19915000cc 5.0L V8
ChevroletTruckK Series19915700cc 5.7L V8
ChevroletTruckK Series19925000cc 5.0L V8
ChevroletTruckK Series19925700cc 5.7L V8
ChevroletTruckK Series19935000cc 5.0L V8
ChevroletTruckK Series19935700cc 5.7L V8
ChevroletTruckK Series19945000cc 5.0L V8
ChevroletTruckK Series19945700cc 5.7L V8
ChevroletTruckK Series19955000cc 5.0L V8
ChevroletTruckK Series19955700cc 5.7L V8
ChevroletTruckK150019905000cc 5.0L V8
ChevroletTruckK150019915000cc 5.0L V8
ChevroletTruckK150019915700cc 5.7L V8
ChevroletTruckK150019925000cc 5.0L V8
ChevroletTruckK150019925700cc 5.7L V8
ChevroletTruckK150019935000cc 5.0L V8
ChevroletTruckK150019935700cc 5.7L V8
ChevroletTruckK150019945000cc 5.0L V8
ChevroletTruckK150019945700cc 5.7L V8
ChevroletTruckK150019955000cc 5.0L V8
ChevroletTruckK150019955700cc 5.7L V8
ChevroletTruckK1500 Suburban19925700cc 5.7L V8
ChevroletTruckK1500 Suburban19935700cc 5.7L V8
ChevroletTruckK1500 Suburban19945700cc 5.7L V8
ChevroletTruckK1500 Suburban19955700cc 5.7L V8
ChevroletTruckK250019905000cc 5.0L V8
ChevroletTruckK250019915000cc 5.0L V8
ChevroletTruckK250019915700cc 5.7L V8
ChevroletTruckK250019925000cc 5.0L V8
ChevroletTruckK250019925700cc 5.7L V8
ChevroletTruckK250019935000cc 5.0L V8
ChevroletTruckK250019935700cc 5.7L V8
ChevroletTruckK250019945000cc 5.0L V8
ChevroletTruckK250019945700cc 5.7L V8
ChevroletTruckK250019955000cc 5.0L V8
ChevroletTruckK250019955700cc 5.7L V8
ChevroletTruckK2500 Suburban19925700cc 5.7L V8
ChevroletTruckK2500 Suburban19935700cc 5.7L V8
ChevroletTruckK2500 Suburban19945700cc 5.7L V8
ChevroletTruckK2500 Suburban19955700cc 5.7L V8
ChevroletTruckK350019897400cc 7.4L V8
ChevroletTruckK350019915700cc 5.7L V8
ChevroletTruckK350019925700cc 5.7L V8
ChevroletTruckK350019935700cc 5.7L V8
ChevroletTruckK350019945700cc 5.7L V8
ChevroletTruckK350019955700cc 5.7L V8
ChevroletAuto and Light TruckR Series19897400cc 7.4L V8
ChevroletTruckR Series19897400cc 7.4L V8
ChevroletTruckR Series19905000cc 5L V8
ChevroletTruckR Series19915000cc 5L V8
ChevroletAuto and Light TruckR Series19915700cc 5.7L V8
ChevroletTruckR Series19915700cc 5.7L V8
ChevroletTruckR Series19925000cc 5L V8
ChevroletTruckR Series19935000cc 5L V8
ChevroletTruckR Series19945000cc 5L V8
ChevroletTruckR Series19955000cc 5L V8
ChevroletAuto and Light TruckR1500 Suburban19915700cc 5.7L V8
ChevroletTruckR250019897400cc 7.4L V8
ChevroletAuto and Light TruckR2500 Suburban19897400cc 7.4L V8
ChevroletAuto and Light TruckR2500 Suburban19915700cc 5.7L V8
ChevroletTruckR350019897400cc 7.4L V8
ChevroletTruckR350019915700cc 5.7L V8
ChevroletAuto and Light TruckSUBURBAN1989454cu in 7.4L V8
ChevroletAuto and Light TruckSuburban19897400cc 7.4L V8
ChevroletAuto and Light TruckSUBURBAN1991350cu in 5.7L V8
ChevroletAuto and Light TruckSuburban19915700cc 5.7L V8
ChevroletAuto and Light TruckSUBURBAN1992350cu in 5.7L V8
ChevroletAuto and Light TruckSuburban19925700cc 5.7L V8
ChevroletAuto and Light TruckSUBURBAN1993350cu in 5.7L V8
ChevroletAuto and Light TruckSuburban19935700cc 5.7L V8
ChevroletAuto and Light TruckSUBURBAN1994350cu in 5.7L V8
ChevroletAuto and Light TruckSuburban19945700cc 5.7L V8
ChevroletAuto and Light TruckSUBURBAN1995350cu in 5.7L V8
ChevroletAuto and Light TruckSuburban19955700cc 5.7L V8
ChevroletAuto and Light TruckTAHOE1995350cu in 5.7L V8
ChevroletTruckTahoe19955700cc 5.7L V8
ChevroletTruckV Series Pickups19905000cc 5L V8
ChevroletTruckV Series Pickups19915000cc 5L V8
ChevroletTruckV Series Pickups19925000cc 5L V8
ChevroletTruckV Series Pickups19935000cc 5L V8
ChevroletTruckV Series Pickups19945000cc 5L V8
ChevroletTruckV Series Pickups19955000cc 5L V8
ChevroletAuto and Light TruckV1500 Suburban19915700cc 5.7L V8
ChevroletAuto and Light TruckV2500 Suburban19915700cc 5.7L V8
ChevroletTruckV350019897400cc 7.4L V8
ChevroletTruckV350019915700cc 5.7L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1989454cu in 7.4L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1990305cu in 5.0L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1991305cu in 5.0L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1991350cu in 5.7L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1992305cu in 5.0L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1992350cu in 5.7L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1993305cu in 5.0L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1993350cu in 5.7L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1994305cu in 5.0L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1994350cu in 5.7L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1995305cu in 5.0L V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS1995350cu in 5.7L V8
GMCTruckC Series19905000cc 5.0L V8
GMCTruckC Series19915000cc 5.0L V8
GMCTruckC Series19915700cc 5.7L V8
GMCTruckC Series19925000cc 5.0L V8
GMCAuto and Light TruckC Series19925700cc 5.7L V8
GMCTruckC Series19925700cc 5.7L V8
GMCTruckC Series19935000cc 5.0L V8
GMCAuto and Light TruckC Series19935700cc 5.7L V8
GMCTruckC Series19935700cc 5.7L V8
GMCTruckC Series19945000cc 5.0L V8
GMCAuto and Light TruckC Series19945700cc 5.7L V8
GMCTruckC Series19945700cc 5.7L V8
GMCTruckC Series19955000cc 5.0L V8
GMCAuto and Light TruckC Series19955700cc 5.7L V8
GMCTruckC Series19955700cc 5.7L V8
GMCTruckC150019905000cc 5.0L V8
GMCTruckC150019915000cc 5.0L V8
GMCTruckC150019915700cc 5.7L V8
GMCTruckC150019925000cc 5.0L V8
GMCTruckC150019925700cc 5.7L V8
GMCTruckC150019935000cc 5.0L V8
GMCTruckC150019935700cc 5.7L V8
GMCTruckC150019945000cc 5.0L V8
GMCTruckC150019945700cc 5.7L V8
GMCTruckC150019955000cc 5.0L V8
GMCTruckC150019955700cc 5.7L V8
GMCAuto and Light TruckC1500 Suburban19925700cc 5.7L V8
GMCAuto and Light TruckC1500 Suburban19935700cc 5.7L V8
GMCAuto and Light TruckC1500 Suburban19945700cc 5.7L V8
GMCAuto and Light TruckC1500 Suburban19955700cc 5.7L V8
GMCTruckC250019905000cc 5.0L V8
GMCTruckC250019915000cc 5.0L V8
GMCTruckC250019915700cc 5.7L V8
GMCTruckC250019925000cc 5.0L V8
GMCTruckC250019925700cc 5.7L V8
GMCTruckC250019935000cc 5.0L V8
GMCTruckC250019935700cc 5.7L V8
GMCTruckC250019945000cc 5.0L V8
GMCTruckC250019945700cc 5.7L V8
GMCTruckC250019955000cc 5.0L V8
GMCTruckC250019955700cc 5.7L V8
GMCAuto and Light TruckC2500 Suburban19925700cc 5.7L V8
GMCAuto and Light TruckC2500 Suburban19935700cc 5.7L V8
GMCAuto and Light TruckC2500 Suburban19945700cc 5.7L V8
GMCAuto and Light TruckC2500 Suburban19955700cc 5.7L V8
GMCTruckC350019915700cc 5.7L V8
GMCTruckC350019925700cc 5.7L V8
GMCTruckC350019935700cc 5.7L V8
GMCTruckC350019945700cc 5.7L V8
GMCTruckC350019955700cc 5.7L V8
GMCAuto and Light TruckJIMMY1991350cu in 5.7L V8
GMCAuto and Light TruckJimmy19915700cc 5.7L V8
GMCTruckJimmy19915700cc 5.7L V8
GMCTruckK Series19905000cc 5.0L V8
GMCTruckK Series19915000cc 5.0L V8
GMCTruckK Series19915700cc 5.7L V8
GMCTruckK Series19925000cc 5.0L V8
GMCAuto and Light TruckK Series19925700cc 5.7L V8
GMCTruckK Series19925700cc 5.7L V8
GMCTruckK Series19935000cc 5.0L V8
GMCAuto and Light TruckK Series19935700cc 5.7L V8
GMCTruckK Series19935700cc 5.7L V8
GMCTruckK Series19945000cc 5.0L V8
GMCAuto and Light TruckK Series19945700cc 5.7L V8
GMCTruckK Series19945700cc 5.7L V8
GMCTruckK Series19955000cc 5.0L V8
GMCAuto and Light TruckK Series19955700cc 5.7L V8
GMCTruckK Series19955700cc 5.7L V8
GMCTruckK150019905000cc 5.0L V8
GMCTruckK150019915000cc 5.0L V8
GMCTruckK150019915700cc 5.7L V8
GMCTruckK150019925000cc 5.0L V8
GMCTruckK150019925700cc 5.7L V8
GMCTruckK150019935000cc 5.0L V8
GMCTruckK150019935700cc 5.7L V8
GMCTruckK150019945000cc 5.0L V8
GMCTruckK150019945700cc 5.7L V8
GMCTruckK150019955000cc 5.0L V8
GMCTruckK150019955700cc 5.7L V8
GMCAuto and Light TruckK1500 Suburban19925700cc 5.7L V8
GMCAuto and Light TruckK1500 Suburban19935700cc 5.7L V8
GMCAuto and Light TruckK1500 Suburban19945700cc 5.7L V8
GMCAuto and Light TruckK1500 Suburban19955700cc 5.7L V8
GMCTruckK250019905000cc 5.0L V8
GMCTruckK250019915000cc 5.0L V8
GMCTruckK250019915700cc 5.7L V8
GMCTruckK250019925000cc 5.0L V8
GMCTruckK250019925700cc 5.7L V8
GMCTruckK250019935000cc 5.0L V8
GMCTruckK250019935700cc 5.7L V8
GMCTruckK250019945000cc 5.0L V8
GMCTruckK250019945700cc 5.7L V8
GMCTruckK250019955000cc 5.0L V8
GMCTruckK250019955700cc 5.7L V8
GMCAuto and Light TruckK2500 Suburban19925700cc 5.7L V8
GMCAuto and Light TruckK2500 Suburban19935700cc 5.7L V8
GMCAuto and Light TruckK2500 Suburban19945700cc 5.7L V8
GMCAuto and Light TruckK2500 Suburban19955700cc 5.7L V8
GMCTruckK350019915700cc 5.7L V8
GMCTruckK350019925700cc 5.7L V8
GMCTruckK350019935700cc 5.7L V8
GMCTruckK350019945700cc 5.7L V8
GMCTruckK350019955700cc 5.7L V8
GMCAuto and Light TruckR Series19897400cc 7.4L V8
GMCTruckR Series19897400cc 7.4L V8
GMCAuto and Light TruckR Series19915700cc 5.7L V8
GMCTruckR Series19915700cc 5.7L V8
GMCAuto and Light TruckR1500 Suburban19915700cc 5.7L V8
GMCTruckR250019897400cc 7.4L V8
GMCAuto and Light TruckR2500 Suburban19897400cc 7.4L V8
GMCAuto and Light TruckR2500 Suburban19915700cc 5.7L V8
GMCTruckR350019897400cc 7.4L V8
GMCTruckR350019915700cc 5.7L V8
GMCAuto and Light TruckSUBURBAN1989454cu in 7.4L V8
GMCAuto and Light TruckSuburban19897400cc 7.4L V8
GMCAuto and Light TruckSUBURBAN1991350cu in 5.7L V8
GMCTruckSuburban19915753cc 5.7L V6
GMCAuto and Light TruckSUBURBAN1992350cu in 5.7L V8
GMCTruckSuburban19925753cc 5.7L V6
GMCAuto and Light TruckSUBURBAN1993350cu in 5.7L V8
GMCTruckSuburban19935753cc 5.7L V6
GMCAuto and Light TruckSUBURBAN1994350cu in 5.7L V8
GMCTruckSuburban19945753cc 5.7L V6
GMCAuto and Light TruckSUBURBAN1995350cu in 5.7L V8
GMCTruckSuburban19955753cc 5.7L V6
GMCAuto and Light TruckV1500 Suburban19915700cc 5.7L V8
GMCAuto and Light TruckV2500 Suburban19915700cc 5.7L V8
GMCTruckV350019897400cc 7.4L V8
GMCTruckV350019915700cc 5.7L V8
GMCAuto and Light TruckYUKON1992350cu in 5.7L V8
GMCTruckYukon19925700cc 5.7L V8
GMCAuto and Light TruckYUKON1993350cu in 5.7L V8
GMCTruckYukon19935700cc 5.7L V8
GMCAuto and Light TruckYUKON1994350cu in 5.7L V8
GMCTruckYukon19945700cc 5.7L V8
GMCAuto and Light TruckYUKON1995350cu in 5.7L V8
GMCTruckYukon19955700cc 5.7L V8
HummerAuto and Light TruckH11995350cu in 5.7L V8
HummerTruckH119955700cc 5.7L V8
HummerAuto and Light TruckH11996350cu in 5.7L V8
HummerTruckH119965700cc 5.7L V8

Replaces These Part Numbers

AC DELCO321-443, 321-552, 321-576, 334-2346
ARROWHEADADR0235, 400-12401
CARGO112879
DELCO10463152, 10463242, 10463266, 1101491, 1102634, 1102637, 1102642
LESTER7901-2, 8101-2, 8145-2, 8185-2
NSAALT-1068
UNIPOINTALT-1068
WAI1-1682-11DR

Frequently Asked Questions

Q: Do I need a larger charge wire for a High Output unit?
A: The high amp unit will operate better than stock, but not to its full potential without a larger charge wire. It’s the same reason firetrucks do not use garden hoses. It is IMPARATIVE to have proper charge and ground cables.

Q: Does a High Amp unit cause any damage to my battery or my vehicles charging system?
A: As long as it is installed properly with battery in good condition, then no. A High Output unit works exactly like a factory unit and only produces what is being demanded. No alternator works continuously at full output. Higher amperage is not bad and will not hurt a battery, but high voltage will blow one up.

Q: Will aftermarket underdrive pulleys (crankshaft power pulley) have any effect on my alternator?
A: Yes, underdrive crankshaft pulleys slow all the components (power steering, a/c, and alternator) to provide more power to the rear wheels. In some cases, the charging systems will fall totally on the battery at idle and completely stop charging.

Q: Where is the best place to get a voltage reading of the alternator output?
A: You’ll get the most accurate voltage reading from the back of the alternator at the main charge post that runs directly to the battery. This must be done while the vehicle is running.

Q: Why is the pulley on a high amp alternator smaller than my stock pulley?
A: The smaller pulley advances the power curve of the alternator just slightly, which produces a little more amperage around the idle if needed.

Q: Will I need a smaller belt for my high amp unit?
A: This varies by application because not all belts and belt tensioners are in the same condition. The tensioner will always tell you if you need a new belt or not. If it’s in range, you will not. If it is out, you will. Generally, you will need a belt that is one inch shorter than stock. You should have no problem finding a replacement wherever you buy your parts. V belt applications simply re-adjust your belt tensions to 3/8” deflection.

Q: What is the difference between a one wire, self-exciting and a self-energizing regulator?
A: Nothing. They are all exactly the same. Different manufacturers use different terms for marketing. The only wire to hook up is the charge wire to the battery. This does require modification for the alternator charge light on the dash.

Q: My stock unit used a five-groove pulley, and you sent my high amp alternator with a 6 groove. Why and what can I do?
A: 5 groove overdrive pullies are not produced. Install the belt on the back groove of the pulley closest to the fan or body of the alternator. The fan is internal, and this application will work just fine.

Q: Can your alternator be run in dual or triple alternator applications?
A: Yes. When wired and mounted correctly, the alternator can run in either dual or triple applications.

Q: Will I need a new battery with a high amp alternator?
A: If your battery is in good condition, and in spec of its OEM rating, then no. Your battery should work equally well with either the OEM and a High Amp unit.

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