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GMC 12351869 Piston & Pinion,(.020 "Oversize)(600 Gram)

1985-1989 GMC

Customer Questions & Expert Answers (3)
12351869 GM Piston & Pinion,(.020 "Oversize)(600 Gram) Illustration 1 of 1
  • Part Description
    PISTON, Engine Piston
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number12351869
    Part DescriptionPISTON, Engine Piston
    Item Dimensions7.1 x 4.5 x 4.6 inches
    Item Weight2.10 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Require Quantity4
    ManufacturerGeneral Motors
    SKU12351869
    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
    1987-1989 GMC S154 Cyl 2.5L2 DOOR, PICKUP
    1985-1989 GMC Safari4 Cyl 2.5LVAN SAFARI
  • 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 12351869 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    What is the recommended method for removing Piston rings for the 1990 Oldsmobile Cutlass? Posted by Dyle W.
    A:
    If a piston ring expanding tool is available, use it to remove each of the rings from the piston. Alternatively, expand the ring just enough to clear the lands of the piston body, then place strips of tin (about Three-quarters in. wide) under the ring at equal distances around the piston and use a slight twisting motion to 'walk' the ring up and off the top. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Fernando / Jan 19, 2025
    Q:
    What should be done after removing the number one connecting rod cap, bearing insert, and Piston for the 1987 Chevrolet Astro? Posted by Suzana S.
    A:
    Ensure not to drop the bearing insert and protect the crankshaft journal and cylinder wall by slipping a short length of plastic or rubber hose over each connecting rod cap bolt. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Nicholas / Aug 22, 2025

Genuine GM Part 12351869, the Right Choice

To ensure reliability, purchase GM part # 12351869 Piston & Pinion,(.020 "Oversize)(600 Gram). It is sometimes referred to as GMC Piston. 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 GMC S15, Safari models.

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