Professional Remanufactured Alternators

ACDelco Professional Remanufactured Alternators are available for most vehicles on the road today with over 2,700 part numbers available for both GM and non-GM vehicles. 

  • Powers most makes and models - Available for most vehicles on the road today 
  • Remanufactured - units are remanufactured to stringent specifications, not rebuilt
  • Replacement - ACDelco replaces each part of its remanufactured units that are most subject to wear and failure with new components
  • Testing - 100% of ACDelco alternators and starters are tested after remanufacture including sound room tests, vibration tests and exposure to hot and cold rooms


•    Rectifier failure is one of the primary causes of alternator failures, most often caused by diode malfunction.
•    ACDelco rectifiers are 100 % electronically tested and replaced when needed.

•    Bearings are always replaced with new
•    Bearings are critical to alternator durability due to extreme lateral loads applied by the drive belt, in addition to excessive heat and vibration.
•    ACDelco alternators use only quality bearings with high temperature lubrication and double-lipped rubber seals.
Rotors and Stators
•    The heart of the alternator and its current-generating components, rotors and stators maybe subjected to excessive heat, which can deteriorate insulation and cause shorts.
•    ACDelco rotors and stators are electronically tested for proper performance, then sealed with a flexible secondary insulating coating.
Slip Rings
•    Slip rings must be in constant contact with the brushes, or uneven wear leading to failure can occur.
•    ACDelco slip rings are precision polished to help maximize electrical contact and consistent output.

•    Brushes are always replaced with new.
•    Worn brushes interrupt electrical contact, shortening the life of alternators.
•    ACDelco brushes are 100% new and durability tested for performance and reliability.

The starting and charging system starts the engine, maintains the battery's charge and provides power to the vehicle’s electrical accessories while the engine is running.

  • Engine doesn't turn over
  • Loss of battery power
  • Some loss of electrical power (dimming headlights, etc…)