Skip to content
Search
19151921 Genuine GM Alternator For Silverado Sierra Express Savana 4.8L 5.3L 6.0L
19151921 Genuine GM Alternator For Silverado Sierra Express Savana 4.8L 5.3L 6.0L

19151921 Genuine GM Alternator For Silverado Sierra Express Savana 4.8L 5.3L 6.0L

P/N: 19151921 Manufactured by: GM
$899.00 - $899.00
$899.00
$899.00 - $899.00
$899.00
5 in Stock
Condition: New
We accept:
  • PayPal
  • Venmo
Need help choosing the right part?Contact our support team
+1 828-705-1030
Monday – Saturday | 8:00 AM – 8:00 PM (EST)
2-3 Day Free Shipping
Return within 30-Days
Packed Ready to Ship
24/7 Expert Support
2-Year Warranty

Unit Auto Parts LLC provides a complimentary 2-Year Warranty on all automotive parts. Shop with confidence knowing your purchase is protected. Learn More

Description

The 19151921 alternator is a GM factory charging assembly designed for Chevrolet, GMC, Cadillac, and related vehicles equipped with compatible V8 engines. It generates reliable electrical output to maintain battery charge and ensure proper operation of vehicle electrical systems.

Vehicle Compatibility

Year Vehicle Engine Trims
2016 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2016 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2015 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2015 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2014 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2014 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2013 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2013 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2012 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2012 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2011 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2011 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2010 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2010 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2009 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2009 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2008 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2008 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2007 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2007 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2007 Chevrolet Silverado 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2007 GMC Sierra 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2007 Hummer H2 6.0L V8 SUV, Pickup
2007 GMC Acadia 3.6L V6 Gas SLE, SLT
2007 Saturn Outlook 3.6L V6 Gas XE, XR
2006 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2006 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2006 Chevrolet Silverado 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2006 GMC Sierra 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2006 Chevrolet Suburban 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2006 GMC Yukon 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2006 Hummer H2 6.0L V8 SUV, Pickup
2005 Buick Rainier 5.3L V8 4 Door
2005 Cadillac Escalade 5.3L V8, 6.0L V8 1/2 Ton, 3/4 Ton, EXT
2005 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2005 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2005 Chevrolet Silverado 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2005 GMC Sierra 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2005 Chevrolet Suburban 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2005 GMC Yukon 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2005 Chevrolet Trailblazer 5.3L V8 4 Door, EXT
2005 GMC Envoy 5.3L V8 4 Door, XL, XUV
2005 Hummer H2 6.0L V8 SUV, Pickup
2004 Buick Rainier 5.3L V8 4 Door
2004 Cadillac Escalade 5.3L V8, 6.0L V8 1/2 Ton, 3/4 Ton, EXT
2004 Chevrolet Avalanche 5.3L V8 1/2 Ton
2004 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2004 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2004 Chevrolet Silverado 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2004 GMC Sierra 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2004 Chevrolet Suburban 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2004 GMC Yukon 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2004 Chevrolet Tahoe 4.8L V8, 5.3L V8, 5.3L Flex 4 Door
2004 Chevrolet Trailblazer 5.3L V8 4 Door, EXT
2004 GMC Envoy 5.3L V8 4 Door, XL, XUV
2004 Chevrolet SSR 5.3L V8 Sport Truck
2004 Hummer H2 6.0L V8 SUV, Pickup
2003 Cadillac Escalade 5.3L V8, 6.0L V8 1/2 Ton, 3/4 Ton, EXT
2003 Chevrolet Avalanche 5.3L V8 1/2 Ton
2003 Chevrolet Express 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2003 GMC Savana 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1/2 Ton, 3/4 Ton, 1 Ton Cargo, Passenger
2003 Chevrolet Silverado 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2003 GMC Sierra 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8, 6.6L Diesel 1500, 2500, 3500
2003 Chevrolet Suburban 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2003 GMC Yukon 4.8L V8, 5.3L V8, 5.3L Flex, 6.0L V8 1/2 Ton, 3/4 Ton
2003 Chevrolet Tahoe 4.8L V8, 5.3L V8, 5.3L Flex 4 Door
2003 Chevrolet Trailblazer 5.3L V8 4 Door, EXT
2003 GMC Envoy 5.3L V8 4 Door, XL, XUV
2003 Hummer H2 6.0L V8 SUV, Pickup


General Specifications

Condition New
Part Number 19151921
Brand GM
Part Type Alternator
Years 2003–2016
Fitment Type Direct replacement
Weight 17.20 lb
Dimensions 9.4 x 7.9 x 7.6 inches


Product Features

The 19151921 alternator is built to match factory performance and installation requirements:

  • Provides stable electrical output for charging system operation
  • Maintains proper battery voltage across varying load conditions
  • Designed for GM truck, van, and SUV electrical systems
  • Matches original mounting points and electrical connections
  • Supports reliable operation of onboard electronics and accessories
  • Manufactured to GM specifications for durability and consistent function

Application Notes

The 19151921 alternator is intended for GM vehicles equipped with the factory charging system and compatible engine configurations listed above. Proper installation ensures correct electrical system performance.

Always verify part number, engine size, VIN, and amperage requirements before installation.

Make an offer
Make an offer
Make an offer