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Chevrolet 84398056 Nitrogen Oxide Catalytic Converter Assembly (W/ Exhaust Pipe)

2017-2022 Chevrolet Express

Customer Questions & Expert Answers (2)
84398056 GM Nitrogen Oxide Catalytic Converter Assembly (W/ Exhaust Pipe)
  • Part Description
    Converter Assembly, Nitrogen Oxide Catalytic (W/ Exhaust Pipe)
  • Replaces
    84100801
  • Manufacturer
    General Motors
Make sure this part fits
$1492.39 MSRP: $2253.37
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Due to manufacturer supply shortage, this item isn't currently available for ordering.

  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Chevrolet
    Manufacturer Part Number84398056
    Part DescriptionConverter Assembly, Nitrogen Oxide Catalytic (W/ Exhaust Pipe)
    Other NamesCatalytic Converter
    Item Dimensions61.7 x 10.6 x 8.2 inches
    Item Weight42.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces84100801
    ManufacturerGeneral Motors
    SKU84398056
    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
    2017-2022 Chevrolet Express4 Cyl 2.8L Diesel1 TON CARGO EXPRESS, 1 TON PASSENGER, 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS
  • Customer Questions & Expert Answers

    Q:
    Do these parts fit my vehicle?
    A:
    You can Select Your Vehicle to check if 84398056 fits your vehicle.
    Posted and answered by GM Parts Specialist Raul
    Q:
    What should you inspect, including the Catalytic Converter, when raising the 2017 Chevrolet Express to service underbody components? Posted by Himu P.
    A:
    When raising the vehicle to service underbody components, you should inspect the converter for leaks, corrosion, dents, and other damage. Check the welds and flange bolts and nuts that attach the front and rear ends of the converter to the exhaust system. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Nov 03, 2025

Genuine GM Part 84398056, the Right Choice

To ensure reliability, purchase GM part # 84398056 Nitrogen Oxide Catalytic Converter Assembly (W/ Exhaust Pipe). It is sometimes referred to as Chevrolet 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. This part fits specific Chevrolet Express models.

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