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GMC 20858260 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P

Customer Questions & Expert Answers (2)
GM 20858260 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P
  • Part Description
    Converter Assembly, 3Way Catalytic (W/ Exhaust Manifold P
  • Replaced By
    19418954
  • Manufacturer
    General Motors
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  • Product Specifications
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number20858260
    Part DescriptionConverter Assembly, 3Way Catalytic (W/ Exhaust Manifold P
    Other NamesCatalytic Converter
    Item Dimensions69.9 x 11.9 x 11.1 inches
    Item Weight24.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU20858260
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California’s Proposition 65
  • Customer Questions & Expert Answers

    Q:
    What steps should be followed to replace the catalytic converter for the 2003 Chevrolet Express? Posted by Customer
    A:
    To replace the catalytic converter, you should raise the vehicle and secure it on jackstands. Spray penetrant onto the threads of the exhaust manifold-to-catalyst pipe nuts and bolts, as well as the catalyst pipe-to-exhaust pipe nuts and bolts. Disconnect and remove the upstream and downstream oxygen sensors. Unscrew the exhaust manifold-to-catalyst pipe flange nuts and bolts, and unscrew the clamp that secures the slip joint between the exhaust pipe behind the catalytic converter and the pipe ahead of the muffler. Remove the catalytic converter assembly and discard the old flange gasket. Installation is the reverse of removal, using new flange gaskets, bolts, and a new clamp.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Catalytic Converter
    Q:
    Is part number 20858260 , 25921611 California legal? Posted by Customer: 2007 Light Truck Express / Savana (2WD)
    A:
    THERE IS NOTHING IN MY CATALOG THAT CAN GIVE ME THAT INFO
    Posted by GMPartsGiant Specialist 16/3/2019
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

Genuine GM Part 20858260, the Right Choice

To ensure reliability, purchase GM part # 20858260 3Way Catalytic Convertor Assembly (W/ Exhaust Manifold P. It is sometimes referred to as GM Catalytic Converter. 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.

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