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Buick 12518877 Gear Kit, Oil Pump

1987-1992 Buick

Customer Questions & Expert Answers (3)
12518877 GM Gear Kit, Oil Pump Product Photo 1 of 2
  • Part Description
    PUMP KIT, Engine Oil Pump
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine Buick
    Manufacturer Part Number12518877
    Part DescriptionPUMP KIT, Engine Oil Pump
    Other NamesGerotor Assembly, Oil Pump
    Item Dimensions4.1 x 3.0 x 0.6 inches
    Item Weight0.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU12518877
    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
    1988-1992 Buick Century4 Cyl 2.5LCUSTOM 2 DOOR, CUSTOM 4 DOOR, CUSTOM STATION WAGON, LIMITED 2 DOOR, LIMITED 4 DOOR, SPECIAL 4 DOOR
    1987-1991 Buick Skylark4 Cyl 2.5L2 DOOR, 4 DOOR, CUSTOM, CUSTOM 2 DOOR, GRAN SPORT 2 DOOR, LIMITED 2 DOOR, LIMITED 4 DOOR, LUXURY EDITION 4 DOOR, SKYLARK
    1987 Buick Somerset4 Cyl 2.5L2 DOOR, CUSTOM, LIMITED 2 DOOR, LIMITED 4 DOOR
  • 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 12518877 fits your vehicle.
    Posted and answered by GM Parts Specialist Julian
    Q:
    How should the Oil Pump be installed for the 1988 Pontiac Fiero? Posted by Sonny C.
    A:
    Align the shaft so that the gear tang mates with the slot on the lower end of the oil pump driveshaft, ensuring the oil pump slides easily into place over the oil pump driveshaft lower bushing. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Henry / Apr 07, 2026
    Q:
    What is the final step after installing the Oil Pump for the 1988 Pontiac Fiero? Posted by Hannon P.
    A:
    Reinstall the oil pan, fill the engine with oil, check the oil level and oil pressure, and inspect for leaks. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Jose / Jun 13, 2024

Genuine GM Part 12518877, the Right Choice

To ensure reliability, purchase GM part # 12518877 Gear Kit, Oil Pump. It is sometimes referred to as Buick Oil Pump, Buick Oil Pump Rotor Set. 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 Buick Century, Skylark, Somerset models.

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