Product Description
Available in: 400amp, 370amp
This a common cas GM alt if unsure of fitment please send us an email via the contatct page.
Large Case Alternators
220amps at 650 rpms
Full amps at 1800rpms
AutoTech Engineering Alernators 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 supplied with the OEM Voltage output for PLUG and PLAY alternators. Voltage settings quoted are already built into the Voltage regulator inside the alternator. A reminder that PCM and ECU type vehicles means that your vehicles “brain/computer” controls the voltages.
Boosted Harness Option
A boosted Harness option is available at additional cost. If you pick this option your harness will come already dioded for you. You can pick from options of 15.3, 15.5 or 15.7 voltages.
What is a Bypass?
If you choose to have a bypass you are wiring to bypass the PCM or ECU control, and we customize a Voltage setting for your vehicle (this allows you to have a higher voltage than your PCM or ECU would allow. This in most cases will end up having your battery light on at all times.
Need help wiring your bypass, or have questions fins out more here:
Tutorial videos & Frequently Asked Questions
Warranty: 1 year parts & lifetime labor
Order Time Frames
Build time is 14 days.
Powder Coating adds up to 5 business days
Shipping takes 5-7 days
If you use klarna pay, Sezzle or Affirm add 7 days for processing.
https://autotechengineeringusa.com/powder_coat_color_chart
- 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
