2003-2005 Chevy Silverado 3500 High Output Alternator

Available Amperages: 370amp, 350amp, 320amp, 270amp, 240amp

• 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            Avalanche 1500 2003-2004           V8 5.3L 5328CC 325CID
• Chevrolet            Avalanche 2500 2003-2004           V8 8.1L 496CID
• Chevrolet            Silverado 1500   2002-2004           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   2003-2004           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 6.6L 6599CC 403CID
• Chevrolet            Silverado 2500 HD           2003-2005           V8 6.0L 5967CC 364CID
• Chevrolet            Silverado 2500 HD           2003-2005           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            Suburban 1500  2003-2004           V8 5.3L 5328CC 325CID
• Chevrolet            Suburban 2500  2003-2004           V8 6.0L 5967CC 364CID
• Chevrolet            Suburban 2500  2003-2004           V8 8.1L 496CID
• Chevrolet            Tahoe    2003-2004           V8 4.8L 294CID
• Chevrolet            Tahoe    2003-2004           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 2500      2003-2004           V6 4.3L 262CID
• Chevrolet            Express 2500      2003-2004           V8 4.8L 294CID
• Chevrolet            Express 2500      2003-2004           V8 5.3L 5328CC 325CID
• Chevrolet            Express 2500      2003-2004           V8 6.0L 5967CC 364CID
• GMC      Sierra 1500         2003-2004           V8 4.8L 294CID
• GMC      Sierra 1500         2002-2004           V8 5.3L 5328CC 325CID
• GMC      Sierra 1500         2003-2004           V8 6.0L 5967CC 364CID
• GMC      Sierra 1500         2002-2003           V8 5.3L 5328CC 325CID
• GMC      Sierra 1500         2003-2004           V6 4.3L 262CID
• GMC      Sierra 1500 HD  2003      V8 6.0L 5967CC 364CID
• GMC      Sierra 2500         2003-2004           V8 6.0L 5967CC 364CID
• GMC      Sierra 2500 HD  2003-2005           V8 6.0L 5967CC 364CID
• GMC      Sierra 2500 HD  2003-2005           V8 6.6L 6599CC 403CID
• GMC      Sierra 2500 HD  2003-2005           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         2004-2005           V8 6.0L 5967CC 364CID
• 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   2003-2004           V8 6.0L 5967CC 364CID
• GMC      Yukon XL 2500   2003-2004           V8 8.1L 496CID
• GMC      Savana 1500       2003-2004           V6 4.3L 262CID
• GMC      Savana 1500       2003-2004           V8 5.3L 5328CC 325CID
• GMC      Savana 2500       2003-2004           V6 4.3L 262CID
• GMC      Savana 2500       2003-2004           V8 4.8L 294CID
• GMC      Savana 2500       2003-2004           V8 5.3L 5328CC 325CID
• GMC      Savana 2500       2003-2005           V8 6.0L 5967CC 364CID
• GMC      Savana 3500       2003-2005           V8 6.0L 5967CC 364CID

Small Case Alternators                  Large Case Alternators

(Alts smaller than 370)                  (Alts 370 and larger)
160amps @ 650 rpms                   220amps at 650 rpms
Full amps @ 1800 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.

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 Time Frames
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