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Chevrolet 12491879 Transmission

2004 Chevrolet Colorado

Customer Questions & Expert Answers (3)
12491879 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 Number12491879
    Part DescriptionTransmission; Transmission, Automatic
    Item Dimensions45.8 x 23.2 x 24.4 inches
    Item Weight212.20 Pounds
    ConditionRemanufactured
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12491879
    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 Colorado5 Cyl 3.5LCREW CAB, EXTENDED CAB, EXTENDED LENGTH, PICKUP
  • 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 12491879 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    What should you do after disconnecting the torque converter from the Transmission Assembly for the 2004 Chevrolet Colorado? Posted by Sara R.
    A:
    Disconnect the transmission cooler lines and secure the transmission to the jack. Remove the bolts securing the transmission to the engine and remove the fill/dipstick tube bracket bolt. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Xavier / Mar 19, 2024
    Q:
    What should be done if the Transmission Assembly will be disassembled for the 2004 GMC Canyon? Posted by Jackie O.
    A:
    Drain the lubricant from the transmission. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Jan 05, 2026

Genuine GM Part 12491879, the Right Choice

To ensure reliability, purchase GM part # 12491879 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 Colorado models.

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