ACDelco 334-2742A | Alternator

Part Number

Fits the following vehicles: 2007-2014 Cadillac Escalade, 2007-2014 Cadillac Escalade ESV, 2007-2013 Cadillac Escalade EXT, 2007-2013 Chevrolet Avalanche, 2007-2013 Chevrolet Silverado 1500, 2007-2014 Chevrolet Silverado 2500 HD, 2007-2014 Chevrolet Silverado 3500 HD, 2007-2014 Chevrolet Suburban 1500, 2007-2013 Chevrolet Suburban 2500, 2007-2014 Chevrolet Tahoe, 2007-2013 GMC Sierra 1500, 2007-2014 GMC Sierra 2500 HD, 2007-2014 GMC Sierra 3500 HD, 2007-2014 GMC Yukon, 2007-2014 GMC Yukon XL 1500, 2007-2013 GMC Yukon XL 2500, 2008-2011 Chevrolet Silverado 3500, 2008-2009 Hummer H2, 2014-2015 Chevrolet Express 2500, 2014-2015 Chevrolet Express 3500, 2014-2015 GMC Savana 2500, 2014-2015 GMC Savana 3500
Special Price $211.72 Regular Price $230.13
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Estimated Ship Date: 1 Business Day or Less


ACDelco Gold (Professional) Remanufactured Alternators are the high quality alternative to Original Equipment (OE) parts. These alternators use high-quality bearings with high-temp lubricant and double-lipped rubber seals. Rotors and stators are electronically tested and then sealed with secondary insulating coating. Remanufacturing alternators is an industry standard practice that involves disassembly of existing units, and replacing components that are most prone to wear with new components. Damaged and obsolete parts are replaced and are end of line tested to ensure they perform to ACDelco specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.


  • Remanufactured using consistent quality processes; not just rebuilt
  • Alternators use high-quality bearings with high-temp lubricant and double-lipped rubber seals, reducing friction, vibration, and noise
  • Rotors and stators are electronically tested and then sealed with secondary insulating coating to help prevent shorts
  • Performance-tested and inspected to ensure they meet your expectations for quality design and component specifications
  • Remanufacturing is an industry standard practice that returns parts into service rather than scrapping them
  • Tested to ensure they perform to ACDelco specifications


Alternator Case Material:Aluminum
Amperage Rating:160.0
DE to Pulley 1st Groove (mm):21.0mm
DE to Rotor Shaft End (mm):42.0
Decoupled Or Clutch Pulley:No
External Fan Included:Not Applicable
Fan Type:Internal
Finish:Same as OE
Ground Type:Negative
Height (in):7.1
Length (in):7.8
Meets or Exceeds Original Equipment Manufacture Specifications:Yes
Mounting Type:1 Pivot Foot
Plug Clock Rear View Main Mounting Ear at 6 O Clock:3
Programming Required:No
Pulley Belt Type:Serpentine
Pulley Groove Quantity:6
Pulley Included:Yes
Regulator Type:Internal
Rotation Direction:Clockwise (Right)
Terminal Connection Quantity:2
Voltage:12 VDC
Weight (lb):16.87
Width (in):8.9


  • 2007-2014 Cadillac Escalade
  • 2007-2014 Cadillac Escalade ESV
  • 2007-2013 Cadillac Escalade EXT
  • 2007-2013 Chevrolet Avalanche
  • 2007-2013 Chevrolet Silverado 1500
  • 2007-2014 Chevrolet Silverado 2500 HD
  • 2007-2014 Chevrolet Silverado 3500 HD
  • 2007-2014 Chevrolet Suburban 1500
  • 2007-2013 Chevrolet Suburban 2500
  • 2007-2014 Chevrolet Tahoe
  • 2007-2013 GMC Sierra 1500
  • 2007-2014 GMC Sierra 2500 HD
  • 2007-2014 GMC Sierra 3500 HD
  • 2007-2014 GMC Yukon
  • 2007-2014 GMC Yukon XL 1500
  • 2007-2013 GMC Yukon XL 2500
  • 2008-2011 Chevrolet Silverado 3500
  • 2008-2009 Hummer H2
  • 2014-2015 Chevrolet Express 2500
  • 2014-2015 Chevrolet Express 3500
  • 2014-2015 GMC Savana 2500
  • 2014-2015 GMC Savana 3500

Customer Questions
Does AC Delco make Ford parts?
No, AC Delco produces parts primarily for General Motors vehicles and does not make parts specifically for Ford vehicles.
Can I use AC Delco parts to replace OEM parts?
Yes, in most cases AC Delco parts can be used as a replacement for OEM parts. However, it's important to ensure that the parts are compatible with your specific make and model of vehicle.
What AC Delco oil filter do I need?
AC Delco offers a variety of oil filters that are compatible with different makes and models of vehicles. To determine which AC Delco oil filter you need, consult your vehicle's owner's manual or use our online filter lookup tool that matches the make, model, and year of your vehicle.
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