Make sure this part fits

Chevrolet 20757891 Generator Assembly

2007-2008 Chevrolet

Customer Questions & Expert Answers (3)
20757891 GM Generator Assembly Illustration 1 of 1
  • Part Description
    Generator Asm ; Generator, Engine Electrical
  • Replaces
    15233597
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Chevrolet
    Manufacturer Part Number20757891
    Part DescriptionGenerator Asm ; Generator, Engine Electrical
    Other NamesAlternator
    Item Dimensions9.1 x 8.2 x 10.1 inches
    Item Weight15.10 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces15233597
    ManufacturerGeneral Motors
    SKU20757891
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2007-2008 Chevrolet Impala6 Cyl 3.9L, 6 Cyl 3.9L FlexLS, LS POLICE CAR, LT, LT 3.5, LTZ, SS
    2007 Chevrolet Monte CarloLS, LT, SS
  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you.
    A:
    You can Select Your Vehicle to check if 20757891 fits your vehicle.
    Posted and answered by GM Parts Specialist Henry
    Q:
    How do you remove the Alternator from the 2007 Chevrolet Impala? Posted by Verified Customer
    A:
    Disconnect the cable from the negative battery terminal, remove the accessory drivebelt, and disconnect the electrical connectors from the alternator. Then, remove the front mounting bolt, front alternator mounting bolt, and alternator rear mounting bolts. On 3.9L models, you'll also need to remove the nut and detach the power steering line clip from the stud before removing the stud. Finally, remove the alternator. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Xavier / Jan 12, 2024
    Q:
    How do you remove the Alternator from the 2007 Chevrolet Monte Carlo? Posted by Jihad E.
    A:
    Disconnect the cable from the negative battery terminal, remove the accessory drivebelt, and disconnect the electrical connectors from the alternator. Then, remove the front mounting bolt, front alternator mounting bolt, and alternator rear mounting bolts. On 3.9L models, you'll also need to remove the nut and detach the power steering line clip from the stud before removing the stud. Finally, remove the alternator. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Jul 14, 2025

Genuine GM Part 20757891, the Right Choice

To ensure reliability, purchase GM part # 20757891 Generator Assembly. It is sometimes referred to as Chevrolet Alternator. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Chevrolet Impala, Monte Carlo models.

GMPartsGiant.com is a leading supplier of genuine GM parts and accessories such as GM 20757891 Generator Assembly. You're certainly in the right place if you're searching for the great cost-effective OEM GM parts. Look no further than our vast inventory of genuine GM parts offered at unbeatable online prices, all of which are backed by the manufacturer's warranty. Not to forget, our hassle-free return policy and quick delivery service ensure a smooth shopping experience for you. For detailed Chevrolet parts information, click here.
Find low prices on genuine OE parts from GM dealerships with fast delivery and dedicated service at GMPartsGiant.com.