Available in: 400a, 370a, 350a, 320a, 240a

Buick Rainier 2004 - 2006 V8 5.3L 5328CC 325CID
Cadillac Escalade 2003 - 2004 V8 5.3L 5328CC 325CID
Cadillac Escalade 2003 - 2004 V8 6.0L 5967CC 364CID
Cadillac Escalade ESV 2003 - 2004 V8 6.0L 5967CC 364CID
Cadillac Escalade EXT 2003 - 2004 V8 6.0L 5967CC 364CID
Chevrolet C3500HD 2001 - 2005 V8 8.1L 496CID
Chevrolet Express 4500 2009 V8 6.0L 5967CC 364CID
Chevrolet Express 4500 2009 - 2016 V8 6.6L 6599CC 403CID
Chevrolet Avalanche 1500 2003 - 2004 V8 5.3L 5328CC 325CID
Chevrolet Avalanche 1500 2004 V8 5.3L 5328CC 325CID
Chevrolet Avalanche 2500 2003 - 2006 V8 8.1L 496CID
Chevrolet Silverado 1500 2003 - 2005 V8 5.3L 5328CC 325CID
Chevrolet Silverado 1500 2003 - 2004 V6 4.3L 262CID
Chevrolet Silverado 1500 2003 - 2004 V8 4.8L 294CID
Chevrolet Silverado 1500 2006 V8 6.0L 5967CC 364CID
Chevrolet Silverado 1500 2003 - 2004 V8 6.0L 5967CC 364CID
Chevrolet Silverado 1500 2003 - 2004 V8 5.3L 5328CC 325CID
Chevrolet Silverado 1500 2004 V6 4.3L 262CID
Chevrolet Silverado 1500 2004 V8 4.8L 294CID
Chevrolet Silverado 1500 2004 V8 5.3L 5328CC 325CID
Chevrolet Silverado 1500 Classic 2007 V8 6.0L 5967CC 364CID
Chevrolet Silverado 1500 HD 2005 - 2006 V8 6.0L 5967CC 364CID
Chevrolet Silverado 1500 HD 2003 V8 6.0L 5967CC 364CID
Chevrolet Silverado 2500 2003 - 2004 V8 6.0L 5967CC 364CID
Chevrolet Silverado 2500 HD 2003 - 2005 V8 6.0L 5967CC 364CID
Chevrolet Silverado 2500 HD 2003 - 2005 V8 6.6L 6599CC 403CID
Chevrolet Silverado 2500 HD 2003 - 2006 V8 8.1L 496CID
Chevrolet Silverado 2500 HD 2003 - 2006 V8 6.0L 5967CC 364CID
Chevrolet Silverado 2500 HD 2004 V8 6.6L 6599CC 403CID
Chevrolet Silverado 2500 HD 2004 - 2005 V8 8.1L 496CID
Chevrolet Silverado 2500 HD Classic 2007 V8 6.0L 5967CC 364CID
Chevrolet Silverado 2500 HD Classic 2007 V8 8.1L 496CID
Chevrolet Silverado 3500 2003 - 2005 V8 6.0L 5967CC 364CID
Chevrolet Silverado 3500 2003 - 2005 V8 6.6L 6599CC 403CID
Chevrolet Silverado 3500 2003 - 2005 V8 8.1L 496CID
Chevrolet Silverado 3500 2006 V8 6.0L 5967CC 364CID
Chevrolet Silverado 3500 2006 V8 8.1L 496CID
Chevrolet Silverado 3500 2004 V8 6.0L 5967CC 364CID
Chevrolet Silverado 3500 2004 V8 6.6L 6599CC 403CID
Chevrolet Silverado 3500 2004 V8 8.1L 496CID
Chevrolet Silverado 3500 Classic 2007 V8 6.0L 5967CC 364CID
Chevrolet Silverado 3500 Classic 2007 V8 8.1L 496CID
Chevrolet SSR 2003 - 2004 V8 5.3L 5328CC 325CID
Chevrolet SSR 2005 - 2006 V8 6.0L 5967CC 364CID
Chevrolet Suburban 1500 2003 - 2004 V8 5.3L 5328CC 325CID
Chevrolet Suburban 1500 2006 V8 6.0L 5967CC 364CID
Chevrolet Suburban 2500 2003 - 2006 V8 6.0L 5967CC 364CID
Chevrolet Suburban 2500 2003 - 2006 V8 8.1L 496CID
Chevrolet Tahoe 2003 - 2004 V8 4.8L 294CID
Chevrolet Tahoe 2003 - 2004 V8 5.3L 5328CC 325CID
Chevrolet TRailblazer 2006 V8 5.3L 5328CC 325CID
Chevrolet TRailblazer EXT 2003 - 2006 V8 5.3L 5328CC 325CID
Chevrolet Express 1500 2007 - 2008 V6 4.3L 262CID
Chevrolet Express 1500 2008 - 2009 V8 5.3L 5328CC 325CID
Chevrolet Express 1500 2003 - 2004 V6 4.3L 262CID
Chevrolet Express 1500 2003 - 2004 V8 5.3L 5328CC 325CID
Chevrolet Express 1500 2006 V6 4.3L 262CID
Chevrolet Express 1500 2006 - 2009 V8 5.3L 5328CC 325CID
Chevrolet Express 2500 2006 - 2011 V8 4.8L 294CID
Chevrolet Express 2500 2008 - 2011 V8 6.0L 5967CC 364CID
Chevrolet Express 2500 2006 - 2016 V8 6.6L 6599CC 403CID
Chevrolet Express 2500 2003 - 2005 V6 4.3L 262CID
Chevrolet Express 2500 2003 - 2006 V8 4.8L 294CID
Chevrolet Express 2500 2003 - 2005 V8 5.3L 5328CC 325CID
Chevrolet Express 2500 2003 - 2011 V8 6.0L 5967CC 364CID
Chevrolet Express 3500 2004 - 2011 V8 4.8L 294CID
Chevrolet Express 3500 2008 - 2011 V8 6.0L 5967CC 364CID
Chevrolet Express 3500 2006 - 2016 V8 6.6L 6599CC 403CID
Chevrolet Express 3500 2003 - 2011 V8 6.0L 5967CC 364CID
Chevrolet Express 3500 2004 - 2005 V8 4.8L 294CID
Chevrolet Express 3500 2006 - 2011 V8 6.0L 5967CC 364CID
GMC C3500HD 2001 - 2002 V8 8.1L 496CID
GMC Savana 4500 2009 V8 6.0L 5967CC 364CID
GMC Savana 4500 2009 - 2016 V8 6.6L 6599CC 403CID
GMC Envoy 2005 - 2006 V8 5.3L 5328CC 325CID
GMC Envoy XL 2003 - 2006 V8 5.3L 5328CC 325CID
GMC Envoy XUV 2004 - 2005 V8 5.3L 5328CC 325CID
GMC Sierra 1500 2003 - 2004 V6 4.3L 262CID
GMC Sierra 1500 2003 - 2004 V8 4.8L 294CID
GMC Sierra 1500 2003 - 2005 V8 5.3L 5328CC 325CID
GMC Sierra 1500 2003 - 2004 V8 6.0L 5967CC 364CID
GMC Sierra 1500 2003 V6 4.3L 262CID
GMC Sierra 1500 2003 V8 4.8L 294CID
GMC Sierra 1500 2006 V8 6.0L 5967CC 364CID
GMC Sierra 1500 Classic 2007 V8 6.0L 5967CC 364CID
GMC Sierra 1500 HD 2003 V8 6.0L 5967CC 364CID
GMC Sierra 1500 HD 2005 - 2006 V8 6.0L 5967CC 364CID
GMC Sierra 2500 2003 - 2004 V8 6.0L 5967CC 364CID
GMC Sierra 2500 HD 2003 - 2006 V8 6.0L 5967CC 364CID
GMC Sierra 2500 HD 2003 - 2005 V8 6.6L 6599CC 403CID
GMC Sierra 2500 HD 2003 - 2006 V8 8.1L 496CID
GMC Sierra 2500 HD Classic 2007 V8 6.0L 5967CC 364CID
GMC Sierra 2500 HD Classic 2007 V8 8.1L 496CID
GMC Sierra 3500 2003 - 2005 V8 6.0L 5967CC 364CID
GMC Sierra 3500 2003 - 2004 V8 6.6L 6599CC 403CID
GMC Sierra 3500 2003 - 2005 V8 8.1L 496CID
GMC Sierra 3500 2004 - 2005 V8 6.0L 5967CC 364CID
GMC Sierra 3500 2004 - 2005 V8 6.6L 6599CC 403CID
GMC Sierra 3500 2004 - 2006 V8 6.0L 5967CC 364CID
GMC Sierra 3500 2004 - 2006 V8 8.1L 496CID
GMC Sierra 3500 Classic 2007 V8 6.0L 5967CC 364CID
GMC Sierra 3500 Classic 2007 V8 8.1L 496CID
GMC Yukon 2003 - 2004 V8 6.0L 5967CC 364CID
GMC Yukon 2003 - 2004 V8 4.8L 294CID
GMC Yukon 2003 - 2004 V8 5.3L 5328CC 325CID
GMC Yukon XL 1500 2003 - 2004 V8 6.0L 5967CC 364CID
GMC Yukon XL 1500 2003 – 2004 V8 5.3L 5328CC 325CID
GMC Yukon XL 2500 2003 - 2006 V8 6.0L 5967CC 364CID
GMC Yukon XL 2500 2003 - 2006 V8 8.1L 496CID
GMC Savana 1500 2006 - 2008 V6 4.3L 262CID
GMC Savana 1500 2006 - 2009 V8 5.3L 5328CC 325CID
GMC Savana 1500 2003 - 2004 V6 4.3L 262CID
GMC Savana 1500 2003 - 2005 V8 5.3L 5328CC 325CID
GMC Savana 1500 2008 - 2009 V8 5.3L 5328CC 325CID
GMC Savana 2500 2003 - 2005 V6 4.3L 262CID
GMC Savana 2500 2003 - 2011 V8 4.8L 294CID
GMC Savana 2500 2003 - 2011 V8 6.0L 5967CC 364CID
GMC Savana 2500 2006 - 2016 V8 6.6L 6599CC 403CID
GMC Savana 3500 2004 - 2011 V8 4.8L 294CID
GMC Savana 3500 2003 - 2011 V8 6.0L 5967CC 364CID
GMC Savana 3500 2006 - 2016 V8 6.6L 6599CC 403CID
Hummer H1 2006 V8 6.6L 400CID
Hummer H2 2003 - 2007 V8 6.0L 5967CC 364CID
Isuzu NPR 2003 - 2007 V8 6.0L 5967CC 364CID
Isuzu Ascender 2003 - 2006 V8 5.3L 5328CC 325CID
Saab 9-7x 2005 - 2006 V8 5.3L 5328CC 325CID

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