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GM 6421972 Valve

1982-1984 Cadillac Commercial Chassis

Customer Questions & Expert Answers (3)
6421972 GM Valve Illustration 1 of 1
  • Part Description
    Valve, Crankcase Vent
  • Manufacturer
    General Motors
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  • Specifications
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  • Q&A
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number6421972
    Part DescriptionValve; Valve, Crankcase Vent
    Item Dimensions13.5 x 3.1 x 1.5 inches
    Item Weight0.80 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU6421972
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1982-1984 Cadillac Commercial Chassis8 Cyl 6.0LCOMMERCIAL CHASSIS
  • Customer Questions & Expert Answers

    Q:
    Will that part fit my vehicle?
    A:
    You can Select Your Vehicle to check if 6421972 fits your vehicle.
    Posted and answered by GM Parts Specialist Jeremy
    Q:
    How does the PCV Valve system work to manage these gases for the 1978 Buick Regal? Posted by Verified Customer
    A:
    The PCV system recycles the gases back into the combustion chamber for reburning by drawing clean, filtered air through the air filter into the crankcase. This air picks up combustion gases and carries them through the oil separator and PCV valve into the induction system. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Jose / Aug 22, 2022
    Q:
    What should you do if the PCV Valve does not click freely for the 1980 Buick Skylark? Posted by Dearl L.
    A:
    If the PCV valve does not click freely, it should be replaced. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Mar 24, 2026

Genuine GM Part 6421972, the Right Choice

To ensure reliability, purchase GM part # 6421972 Valve. It is sometimes referred to as GM PCV Valve. 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 Cadillac Commercial Chassis models.

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