2000-2013 Chevrolets & GMC's with 4.8, 5.3, 6.0 and ,6.2 motors. (see below for more specific fitment)

370 Amp Alternator: Supplied with Shorter Fan belt Idler Pulley mounting hardware.

Large Case Alternators
220amps at 650 rpms
Full amps at 1800rpms

AutoTech Engineering Alternators require a .5 inch smaller belt than your OEM Alternator

AutoTech Engineering alternators need a minimum of 650rpm to charge.

Unless otherwise quoted or instructed, our units come with the OEM voltage output for plug-and-play alternators. The quoted voltage settings are already built into the alternator's voltage regulator. Remember that in PCM- and ECU-controlled vehicles, the vehicle's “brain/computer” controls the voltage.

Boosted Harness Option
A boosted harness option is available at an additional cost. If you select this option, your harness will arrive with the diode already installed. You can choose 15.3, 15.5, or 15.7 volts.

What is a Bypass?
If you choose to have a bypass, you are wiring around the PCM or ECU voltage control. This allows us to customize the charging voltage beyond what the vehicle’s computer normally permits. In most cases, the battery warning light will remain illuminated.

Bypass charging voltage: 14.8V.

Important: A PCM/ECU bypass is required when using the boosted harness.

Need help wiring your bypass or have questions? Find out more here:

Tutorial videos & Frequently Asked Questions

Warranty: One year on parts and lifetime labor.

Order Timeframes
Build time is 14 days.
Powder coating adds up to 5 business days.
Shipping takes 5-7 days.

If you use Klarna, Sezzle, or Affirm, please allow an additional seven days for processing.

https://autotechengineeringusa.com/powder_coat_color_chart

Buick Rainier 5.3L 2004 - 2006
Cadillac Escalade 5.7 / 6.0 / 6.2 1999 - 2004
Chevrolet Astro Van 4.3L 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 6.6L Duramax 2001 - 2007
Chevrolet S-10 / Blazer 4.3L 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 5.3L 2003 - 2006
GMC Envoy 5.3L 2003 - 2006
GMC Full Size Truck / Sierra 4.3L 1996 - 2004
GMC Full Size Truck / Sierra 4.8L 1999 - 2004
GMC Full Size Truck / Sierra 5.0L 1996 - 1999
GMC Full Size Truck / Sierra 5.3L 1999 - 2004
GMC Full Size Truck / Sierra 5.7L 1996 - 2000
GMC Full Size Truck / Sierra 6.0L 1999 - 2005
GMC Full Size Truck / Sierra 6.6 Diesel 2001 - 2006
GMC Full Size Truck / Sierra 7.4L 1996 - 2000
GMC Full Size Truck / Sierra 8.1L 2001 - 2005
GMC Safari 4.3L 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 6.0L 2003 - 2007
Oldsmobile Bravada 4.3L 1994 - 2001
Pontiac Firebird 5.0 / 5.7 1998 – 2002
Cadillac Escalade 6.2L 2014 - 2019
Chevrolet Silverado 1500 / 2500 / 3500 All Gas Engines 2014 - 2018
Chevrolet Silverado 1500 / 2500 / 3500 6.6L Duramax 2014 - 2018
Chevrolet Suburban All Gas Engines 2020 - 2018
Chevrolet Tahoe All Gas Engines 2014 - 2018
GMC Sierra 1500 / 2500 / 3500 4.3L / 5.3 2014 - 2018
GMC Sierra 1500 / 2500 / 3500 6.0L 2014 - 2016
GMC Sierra 1500 / 2500 / 3500 6.2L 2014 - 2018
GMC Sierra 2500 / 3500 6.6L Duramax 2014 – 2018
GMC Yukon All Gas Engines 2014 - 2018