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Chevrolet 12491892 Transmission

2004 Chevrolet

Customer Questions & Expert Answers (3)
12491892 GM Transmission Illustration 1 of 1
  • Part Description
    Transmission, Automatic
  • Manufacturer
    General Motors
Make sure this part fits
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  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Chevrolet
    Manufacturer Part Number12491892
    Part DescriptionTransmission; Transmission, Automatic
    Item Dimensions46.2 x 24.9 x 22.8 inches
    Item Weight232.80 Pounds
    ConditionRemanufactured
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12491892
    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 Avalanche8 Cyl 5.3L1/2 TON
    2004 Chevrolet Express8 Cyl 5.3L1/2 TON CARGO EXPRESS, 1/2 TON PASSENGER EXPRESS, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS
    2004 Chevrolet Silverado8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex1500 CREW CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX
    2004 Chevrolet Suburban8 Cyl 5.3L, 8 Cyl 5.3L Flex1/2 TON
    2004 Chevrolet Tahoe8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex4 DOOR 1/2 TON
  • 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 12491892 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 Noel B.
    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 Jeremy / Jun 07, 2025
    Q:
    What are the initial steps to begin the Transmission Assembly service for the 2004 Chevrolet Express? Posted by Sesario S.
    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 Fernando / May 29, 2026

Genuine GM Part 12491892, the Right Choice

To ensure reliability, purchase GM part # 12491892 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, Tahoe models.

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