No Image Available

ACDelco 20758749 - Alternator

GM Original Equipment


ACDelco GM Original Equipment Light Duty Alternators have components that are newly manufactured, and are GM-recommended replacement for your vehicle’s original alternator. Alternators provide power to the vehicle's electrical systems and charge the battery while the engine is running. These original equipment alternators have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Availability: Call to check stock.
Shipping: 1 to 3 Day Delivery to Most Locations Within The Continental United States!
Pricing: $443.49




Warranty: 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see for more details.

Features & Benefits:

  • 100% newly manufactured as an exact replacement for your GM vehicle's original alternator
  • Components are tested to meet original specification requirements for remarkable durability
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specifications for fit, form, and function


Q: Can I be assured that the unit will last, especially in extreme weather?
A: Yes. These alternators are designed to withstand a wide range of weather conditions.

Q: Do all alternators supply the same amperage?
A: No. Some vehicles require more amperage than others depending on the amount of electronics that need to be operated. Consult the vehicle information for proper application.

Maintenance & Troubleshooting

Signs of Wear & Troubleshooting

  • Indicators that there could be a problem with your vehicle's alternator are:
    • Engine doesn't turn over or start
    • Loss of battery power
    • Some loss of electrical power (dimming headlight, etc.)
    • Grinding or squeaking noise
    • Alternator warning light illuminates
  • Other vehicle parts that might cause related alternator problems include:
    • Bad battery
    • Broken, frayed, or loose drive belt
    • Electrical fault
    • Worn or damaged bearings
    • Corroded or loose battery terminal connection
    • Burned fuses or fusible links
  • When making repairs on electrical systems, in-depth diagnosis is needed before parts replacement. This includes checking:
    • Battery health
    • Diagnostic trouble codes

Good Maintenance Practices

  • There is a cooling fan in most alternators to keep it from overheating. Making sure that the fan is clean will help the fan and alternator run properly.
  • It is also important that all electrical connections are kept clean and firmly attached, which will make sure the battery is being properly charged by the alternator.

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


  • 20758749
  • 20758749
  • 707773698792
  • ACDelco
  • Call to check stock.
  • New


Shipping Information

  • Item Requires Shipping
  • 13.2 lbs.
  • W11.0000” x H9.7000” x L11.1200”
  • 1 to 3 Day Delivery to Most Locations Within The Continental United States!

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.

California Residents: Prop 65

WARNING: Cancer and Reproductive Harm -