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Buick 8646939 PUMP, Transmission Oil Pump

1984-1986 Buick

Customer Questions & Expert Answers (3)
8646939 GM PUMP, Transmission Oil Pump
  • Part Description
    PUMP, Transmission 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 Number8646939
    Part DescriptionPUMP, Transmission Oil Pump
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU8646939
    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
    1984-1986 Buick Century4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 3.0L, 6 Cyl 3.8L, 6 Cyl 4.3L DieselCUSTOM 2 DOOR, CUSTOM 4 DOOR, CUSTOM STATION WAGON, LIMITED 2 DOOR, LIMITED 4 DOOR
    1985-1986 Buick Electra6 Cyl 3.0L, 6 Cyl 3.8L, 6 Cyl 4.3L Diesel, 8 Cyl 5.0L2 DOOR, 4 DOOR, COUPE 2 DOOR, SEDAN 4 DOOR, T-TYPE COUPE 2 DOOR, T-TYPE SEDAN 4 DOOR
    1986 Buick Lesabre6 Cyl 3.0L, 6 Cyl 3.8LCUSTOM 2 DOOR, CUSTOM 4 DOOR, LIMITED 2 DOOR, LIMITED 4 DOOR
    1986 Buick Riviera6 Cyl 3.8LRIVIERA, T TYPE
  • Customer Questions & Expert Answers

    Q:
    Do these parts fit my vehicle?
    A:
    You can Select Your Vehicle to check if 8646939 fits your vehicle.
    Posted and answered by GM Parts Specialist Raul
    Q:
    What is the procedure for installing the Oil Pump assembly for the 1985 Oldsmobile Cutlass? Posted by Magu L.
    A:
    Position the pump assembly and align the slot on the top end of the extension shaft with the drive tang on the lower end of the distributor, ensuring proper mating between these components since the distributor drives the oil pump. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Syed / Sep 25, 2023
    Q:
    How can the Oil Pump and screen be accessed for the 1984 Buick Century? Posted by Verified Customer
    A:
    By removing the oil pan. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Julian / Sep 14, 2022

Genuine GM Part 8646939, the Right Choice

To ensure reliability, purchase GM part # 8646939 PUMP, Transmission Oil Pump. It is sometimes referred to as Buick Oil Pump. 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, Electra, Lesabre models.

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