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Chevrolet 12491890 Transmission

2004 Chevrolet

Customer Questions & Expert Answers (3)
12491890 GM Transmission Illustration 1 of 1
  • Part Description
    Transmission, Automatic
  • Manufacturer
    General Motors
Make sure this part fits
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  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Chevrolet
    Manufacturer Part Number12491890
    Part DescriptionTransmission; Transmission, Automatic
    Item Dimensions48.0 x 22.6 x 24.6 inches
    Item Weight240.80 Pounds
    ConditionRemanufactured
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12491890
    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
    2004 Chevrolet Express6 Cyl 4.3L3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS
    2004 Chevrolet Silverado6 Cyl 4.3L1500 EXTENDED CAB STANDARD BOX
  • Customer Questions & Expert Answers

    Q:
    I'm wondering if this is complete and correct part for my vehicle.
    A:
    You can Select Your Vehicle to check if 12491890 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    Who should assess problems with the Transmission Assembly of the automatic transmission for the 2004 Chevrolet Express? Posted by Darrell G.
    A:
    Problems with the automatic transmission should be assessed by a dealer service department or other qualified repair facility. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Syed / Sep 15, 2022
    Q:
    What are the initial steps to begin the Transmission Assembly service for the 2004 Chevrolet Express? Posted by Juli H.
    A:
    Begin by removing the engine cover and disconnecting the cable from the negative battery terminal. Then, raise the vehicle securely on jackstands. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Henry / Feb 11, 2026

Genuine GM Part 12491890, the Right Choice

To ensure reliability, purchase GM part # 12491890 Transmission. It is sometimes referred to as Chevrolet Transmission Assembly. 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 Express, Silverado models.

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