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Mechman Alternators 8206270

270 Amp G Series Alternator for Select 1994-2012 GM Vehicles

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Mechman Alternators are built to order: new or used product can not be returned. Any defect will be remedied directly through the manufacturer. We invite you to call and speak with our Sales Specialists so we can ensure you have the right solution for your vehicle!

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$448.89

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Mechman Alternators 8206270

270 Amp G Series Alternator for Select 1994-2012 GM Vehicles

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MechMan Alternators BIG3

Premium Zero Gauge "Big 3" Cable Upgrade Kit

$61.38

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$149.99

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Mechman G Series Alternators

The hugely popular G series of large case 3 phase alternators have been tried and true for over 15 years. These units offer excellent low RPM output, with 100,000 mile durability. This G series unit features Mechman's custom solid copper rectifier with large 65 amp press fit diodes and over sized output stud for excellent durability. It cranks out over 165 amps at just 600 RPM engine speed on any standard GM truck, with full 270+ amps at anything above 1800 rpm engine speed! A 46mm hard anodized billet aluminum 6 rib pulley is used to maximize low RPM output, so a 1/2" to 1" shorter than stock length belt (not included) is recommended for optimum belt tension. The 270 amp G series units are made in the USA and come with a 2 year warranty.


General Features:

  • 270 amp alternator
  • For use with select 1994-2012 GM vehicles
  • Excellent low RPM output
  • Incredibly durable design
  • Custom designed solid copper rectifier with 6 press fit high amp diodes to spread out heat
  • Heavy duty regulator
  • Premium NTN bearings
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty

Compatibility List

  • Buick
    • 2004 - 2006 Rainier 5.3 Liter Engine
  • Cadillac
    • 1999 - 2000 Escalade 5.7 Liter Engine with 105 Amp Factory Alternator
    • 2002 - 2004 Escalade 5.3, 6.0 and 6.2 Liter Engines
  • Chevrolet
    • 1996 - 2005 Astro 4.3 Liter Engine
    • 2002 - 2004 Avalanche All Engines
    • 1998 - 2002 Camaro 5.7 Liter Engine
    • 2001 - 2012 Express Van All Engines
    • 1996 - 1999 Full Size Truck 5.0 Liter Engine
    • 1996 - 2000 Full Size Truck 5.7 Liter Engine
    • 1996 - 2000 Full Size Truck with Factory CS130D Alternator
    • 1996 - 2004 Full Size Truck 4.3 Liter Engine
    • 1999 - 2004 Full Size Truck 4.8 Liter Engine
    • 1999 - 2004 Full Size Truck 5.3 Liter Engine
    • 1999 - 2004 Full Size Truck 6.0 Liter Engine
    • 2001 - 2005 Full Size Truck 8.1 Liter Engine
    • 2001 - 2006 Full Size Truck 6.6 Liter Diesel Engine
    • 1994 - 2004 S-10 / Blazer 4.3 Liter Engine
    • 2003 - 2004 SSR 5.3 Liter Engine
    • 2005 - 2006 SSR 6.0 Liter Engine
    • 1996 - 1999 Subruban 5.7 Liter Engine with 105 Amp Factory Alternator
    • 2000 - 2004 Suburban 6.0 Liter Engine
    • 2001 - 2006 Suburban 8.1 Liter Engine
    • 2002 - 2004 Suburban 5.3 Liter Engine
    • 1996 - 1999 Tahoe/Full Size Blazer 5.7 Liter Engine with 105 Amp Factory Alternator
    • 2000 - 2004 Tahoe/Full Size Blazer 4.8 Liter Engine
    • 2000 - 2004 Tahoe/Full Size Blazer 5.3 Liter Engine
    • 2000 - 2004 Tahoe/Full Size Blazer 6.0 Liter Engine
    • 2006 Trailblazer 6.0 Liter Engine
    • 2003 - 2006 Trailblazer 5.3 Liter Engine
  • GMC
    • 2006 Envoy 6.0 Liter Engine
    • 2003 - 2006 Envoy 5.3 Liter Engine
    • 1996 - 1999 Full Size Truck 5.0 Liter Engine
    • 1996 - 2000 Full Size Truck 5.7 Liter Engine
    • 1996 - 2000 Full Size Truck All Engines with 105 Amp Factory Alternator
    • 1999 - 2004 Full Size Truck 4.3 Liter Engine
    • 1999 - 2004 Full Size Truck 4.8 Liter Engine
    • 1999 - 2004 Full Size Truck 5.3 Liter Engine
    • 1999 - 2005 Full Size Truck 6.0 Liter Engine
    • 2001 - 2005 Full Size Truck 8.1 Liter Engine
    • 2001 - 2006 Full Size Truck 6.6 Liter Diesel Engine
    • 1996 - 2004 Jimmy 4.5 Liter Engine
    • 1994 - 2004 S-15 4.3 Liter Engine
    • 2001 - 2009 Savana Van All Engines
    • 1995 - 2004 Sonoma 4.4 Liter Engine
    • 1996 - 1999 Yukon 5.7 Liter Engine with 105 Amp Factory Alternator
    • 2000 - 2004 Yukon 4.8 Liter Engine
    • 2000 - 2004 Yukon 6.0 Liter Engine
  • Hummer
    • 2003 - 2007 H2 6.0 Liter Engine
  • Oldsmobile
    • 1994 - 2001 Bravada 4.3 Liter Engine
  • Pontiac
    • 1998 - 2002 Firebird 5.0 and 5.7 Liter Engines

NOTE: Some GM vehicles equipped with the heavy duty charging package and CS144 alternator will require a harness adapter in order for the OEM alternator plug to fit. Some 2005 and newer GM's have a 2 pin connection that isn't compatible with this unit. Please check your vehicle's original alternator plug and compare to the plug photo to verify proper fitment before ordering. Adapter harnesses are available (sold separately) for customers with rectangular shaped alternator plugs For customers desiring adjustable voltage, these units are compatible with the Adjustable Voltage Boost module for 1996 - 2004 GM 4 pin oval connectors.



Not Sure Which Alternator Fits Your Vehicle?


Check the Mechman Alternators Vehicle Fit Guide to find the right alternator for your vehicle!

Product Specifications

Amperage Output
270
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Buick Rainier
Cadillac Escalade
Chevy Astro
Chevy Avalanche
Chevy Blazer
Chevy Camaro
Chevy Express Van
Chevy Full Size Blazer
Chevy Full Size Truck
Chevy S-10
Chevy SSR
Chevy Suburban
Chevy Tahoe
Chevy Trailblazer
GMC Envoy
GMC Full Size Truck
GMC Jimmy
GMC Savana Van
GMC Sonoma
GMC Yukon
Hummer H2
Oldsmobile Bravada
Pontiac Firebird

Warranty and Return Policy

Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
100%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
4.7
Features
4.8
Design
4.9
Usability
4.9
mrknightrider2g25

Horn Lake,Ms.

Overall
Durability
Value
Features
Design
Usability
mechman

October 27, 2014

the alternator was exactly what i needed it was stronger than stated it puts out 278 amps at 1800 and i think it was 169 amps at idle was much needed and also i received it quicker from sonix electronix because they had it in stop already rather than waiting 2-4 weeks

61 of 74 found this helpful

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Descaro

San Jose

Overall
Durability
Value
Features
Design
Usability
Best alt

October 20, 2014

Got it on my 99 trans am pushing a hifonics brz 2400 3pioneer12s and a D3400 batt.No voltage drop below 14.So far it's great

55 of 70 found this helpful

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Hawhee

Bismarck ND

Overall
Durability
Value
Features
Design
Usability
Awsome a great pick fitted perfect

December 8, 2015

This alternator is a perfect fit and powerful output I'm very pleased with this product

1 of 1 found this helpful

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Dmo

Franklin, Ky

Overall
Durability
Value
Features
Design
Usability
A must have for any basshead

September 9, 2016

I have an 02 Tahoe with a huge audio system. I had an Iraggi 320 amp and it died on me so I needed a quick replacement. Everyone knows how slow Iraggi is on his warranties. So I bought this one. I ordered it and it was here the very next day. A+ shipping and an awesome alternator! This things holds voltage well! I usually stay in the 13s at full tilt. I'm running almost 4,000 watts. Granted I do have XS power batteries and 1/0 wire. I plan to get another one of these and run a dual alternator bracket and add more subs and amps! Buy this alternator! You won't regret it!

0 of 0 found this helpful

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Chad

Westvirginia

Overall
Durability
Value
Features
Design
Usability
Awesome alternator

August 18, 2016

Bought this for a 2005 hummer h2 I have two 12" jlw7 with two jl 1200/1 amps just for the subs did the big four upgrade run another battery lights dim was very bad until this alternator now my volts don't move these alternators are made in USA brand new they are great don't hesitate

0 of 0 found this helpful

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Speedy

Las Vegas

Overall
Durability
Value
Features
Design
Usability
The best!!!!

August 17, 2016

Just one word... Power!!!!!! And a lot improve on your electric system !!! Just the best upgrade for your sound system

0 of 0 found this helpful

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Anthony

New york

Overall
Durability
Value
Features
Design
Usability
Powerfull!

August 1, 2016

Right out of the box my voltage sits at 14.7 all day long with this alternator.. not too crazy about the design of the power nd ground studs on it, as it will easily strip out of the casing if torqued too tight especially the ground.. but as far as power it's Allllll there.

0 of 0 found this helpful

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Starlit

OROVILLE, CA

Overall
Durability
Value
Features
Design
Usability
mechman

April 29, 2016

I would definitely recommend this altenator to any one great buy, good price, I didn't get a logo sticker though

0 of 0 found this helpful

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Descaro

San Jose

Overall
Durability
Value
Features
Design
Usability
Still pounding

March 7, 2016

I have had it for 17 months now and it's still charging my system perfect.Remember most amps say full power at 14.4 volts.With out a alternator you can't do it right so just spend the money and stop getting 3 batteries

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

MechMan Alternators BIG3

Premium Zero Gauge "Big 3" Cable Upgrade Kit

Your Price $61.38

Perfect Match Big 3 Kit

Get the right Big 3 Kit to go with your High Output Alternator

Your Price $69.99

XS Power XP750-CK

The Perfect Secondary Battery and Installation Kit for 1000-1500 Watt Audio Sytems!

Your Price $149.99

XS Power D3400

A Great Match for your Vehicle! Recommended for systems 2500W-3500W RMS!

Your Price $259.99

Mechman Alternators 1020R

Secondary Battery Installation Kit for Audio Systems up to 4000 Watts

Your Price $89.00

Browse 4 questions and 5 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Mechman has a strong background in the car audio world..
Realm of Excursion moderator SRI3850341..
Shane R on Sep 4, 2016
It was in stock and ready would have had to wait weeks from any other company
Melissa H on Dec 23, 2014
cause I need it and Mechman is one of the best out there had bought one on ebay and cheap unit gave out only lasted 2 months
Frank R on Aug 2, 2016
does this have the four pin oval or double d plug?
Arlington J on May 27, 2015
Best Answer: 4 pin oval plug but i suggest to go with another alternator company alternater crapped out after 3k miles and mechmans customer service is horrible i threw mine away and bought one from singer alternators 10 times the alternator and life time warranty and best customer service in the biz
Reply · Report · Melissa H on May 27, 2015
· Add Answer · I Have This Question Too (0)
This looks like the small case alt. If so would it fit my 1993 chevy Silverado? It is the 5 1/8 case like this one. 5.7 liter 350. Any help is appreciated.
Thomas J on Apr 1, 2015
Best Answer: Hello Thomas,

Being that your vehicle is NOT listed in the compatibility list, we cannot confirm fitment. Please contact MECHMAN for further assistance.
Reply · Report · Rick MStaff on Apr 1, 2015
· Add Answer · I Have This Question Too (0)
Is it enough to run air-conditioning cooling radiator fans and lights at lower RPM?
Abdullah A on Sep 10, 2016
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

8206270

UPC

767675509930

Weight

18.00lbs

Internal SKU

g8206270

Internal Product ID

79343

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Mechman Alternators 8206270