×
Contact Us Live Chat or 1-888-737-9766
My Garage
My Account
Cart
Search Bar
Search by Part Number, Part Name, or Vehicle
Track Order Help Center
Make sure this part fits

Pontiac 89017421 Piston Asm,(W/ Pinion)(0.5 Mm Oversize)

1996-1999 Pontiac

Customer Questions & Expert Answers (11)
GM 89017421 Piston Asm,(W/ Pinion)(0.5 Mm Oversize)
GM 89017421 Piston Asm,(W/ Pinion)(0.5 Mm Oversize)
  • Part Description
    PISTON, Engine Piston
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine Pontiac
    Manufacturer Part Number89017421
    Part DescriptionPISTON, Engine Piston
    Item Dimensions5.5 x 4.5 x 5.8 inches
    Item Weight1.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Require Quantity6
    ManufacturerGeneral Motors
    SKU89017421
    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
    1996-1998 Pontiac Grand Am6 Cyl 3.1LGT 2 DOOR, GT 4 DOOR, SE 2 DOOR, SE 4 DOOR
    1996-1999 Pontiac Grand Prix6 Cyl 3.1L2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, SE 2 DOOR, SE 4 DOOR

  • Customer Questions & Expert Answers

    Q:
    Do these parts fit my vehicle? Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 89017421 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    What is the purpose of checking the endplay, and how is it measured for the 1994 Chevrolet Beretta? Posted by Customer
    A:
    The purpose of checking the endplay is to ensure the proper clearance between the connecting rod and the crankshaft. It is measured by sliding feeler gauges between the first connecting rod and the crankshaft throw until the play is removed. The endplay is equal to the thickness of the feeler gauge(s).
    Posted by GMPartsGiant Specialist
    See expert answers on similar Piston
    Q:
    Under what conditions may new pistons not be necessary, and what wear patterns should be checked on pistons for the 1993 Chevrolet Beretta? Posted by Customer
    A:
    New pistons may not be necessary if the pistons and cylinder walls show no significant damage or excessive wear, and the engine block isn't rebored. You should check for even vertical wear on piston thrust surfaces and slight top ring looseness in its groove.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Piston
    Q:
    How should the piston ring gaps be positioned around the piston during installation for the 1993 Chevrolet Beretta? Posted by Customer
    A:
    Position the piston ring gaps at 120-degree intervals around the piston.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Piston
    Q:
    How can the condition of the piston and connecting rod assembly be assessed for the 1997 Oldsmobile Cutlass? Posted by Customer
    A:
    While the piston is still connected to the connecting rod, it is advisable to swivel the rod back and forth to assess the degree of difficulty. Comparing all piston/rod assemblies can help determine if the rods appear loose on the piston pins and move with little or no drag, indicating that the piston pins have worn and must be replaced.
    Posted by GMPartsGiant Specialist
    Q:
    What should be checked regarding the piston ring gaps for the 1989 Oldsmobile Cutlass? Posted by Customer
    A:
    It is important to check that all the piston ring gaps are positioned properly.
    Posted by GMPartsGiant Specialist
    Q:
    How should the work be organized when removing the ridge from the cylinders for the 1997 Oldsmobile Cutlass? Posted by Customer
    A:
    Work on one cylinder at a time by turning the engine so the piston is at the bottom of its stroke, and place a rag on top of the piston to catch the cuttings.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Piston
    Q:
    What should be done if the ring end gap is insufficient for the 1992 Oldsmobile Cutlass? Posted by Customer
    A:
    If the gap is insufficient, replace the ring with another top ring and check all top rings similarly, using a fine file to adjust if necessary.
    Posted by GMPartsGiant Specialist
    Q:
    What is the next step after removing the cylinder ridges for the 1997 Pontiac Grand Prix? Posted by Customer
    A:
    Turn the engine upside-down with the crankshaft facing up.
    Posted by GMPartsGiant Specialist
    Q:
    What tool is used to guide the piston into the cylinder for the 1999 Pontiac Grand Prix? Posted by Customer
    A:
    Use a piston ring compressor to guide the piston into the cylinder.
    Posted by GMPartsGiant Specialist
    Q:
    What is the process for measuring piston-to-bore clearance for the 1991 Pontiac Grand Prix? Posted by Customer
    A:
    Measure the bore and piston diameter, ensuring they are correctly matched. Subtract the piston diameter from the bore diameter to determine clearance; if it exceeds specifications, rebore the block and install new pistons and rings.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Piston
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!

Genuine GM Part 89017421, the Right Choice

To ensure reliability, purchase GM part # 89017421 Piston Asm,(W/ Pinion)(0.5 Mm Oversize). It is sometimes referred to as Pontiac 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 Pontiac Grand Am, Grand Prix models.

GMPartsGiant.com is a leading supplier of genuine GM parts and accessories such as GM 89017421 Piston Asm,(W/ Pinion)(0.5 Mm Oversize). You're certainly in the right place if you're searching for the great cost-effective OEM GM parts. Look no further than our vast inventory of genuine GM parts offered at unbeatable online prices, all of which are backed by the manufacturer's warranty. Not to forget, our hassle-free return policy and quick delivery service ensure a smooth shopping experience for you. For detailed Pontiac parts information, click here.

Why choose GM Parts Giant

  • Dedicated Service

    Your complete satisfaction is our #1 goal

  • Lowest Prices

    Best deals on genuine OE parts from dealerships

  • Fast Delivery

    Orders are processed and delivered promptly