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Make sure this part fits

GM 12587621 Seal,Crankshaft Rear Oil

2001-2007 GM

Customer Questions & Expert Answers (9)
GM 12587621 Seal,Crankshaft Rear Oil
GM 12587621 Seal,Crankshaft Rear Oil
  • Part Description
    SEAL, Engine Rear Main Bearing
  • Position
    Rear
  • Replaces
    12559277
  • Manufacturer
    General Motors
Make sure this part fits
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers

  • Related Parts

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  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number12587621
    Part DescriptionSEAL, Engine Rear Main Bearing
    Other NamesRear Main Seal
    Item Dimensions5.5 x 5.5 x 0.6 inches
    Item Weight0.60 Pounds
    PositionRear
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces12559277
    ManufacturerGeneral Motors
    SKU12587621
    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
    2002-2005 Cadillac Escalade3/4 TON, EXT 3/4 TON
    2002-2006 Chevrolet Avalanche8 Cyl 8.1L3/4 TON
    2001-2002 Chevrolet C3500C3500 CAB CHASSIS 135.5, C3500 CAB CHASSIS 159.9, C3500 CAB CHASSIS 183.5
    2001-2002 Chevrolet Express8 Cyl 8.1L1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RECREATIONAL VEHICLE EXPRESS, 1 TON PASSENGER
    2001-2007 Chevrolet Silverado8 Cyl 8.1L2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB
    2001-2006 Chevrolet Suburban8 Cyl 8.1L2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3/4 TON, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS EXTENDED CAB 185.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB, EXT 3/4 TON, XL 3/4 TON
    2001-2002 GMC Savana8 Cyl 8.1L1 TON CARGO SAVANA, 1 TON COMMERCIAL/RECREATIONAL VEHICLE SAVANA, 1 TON PASSENGER
    2001-2007 GMC Sierra8 Cyl 8.1L2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS EXTENDED CAB 185.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB
    2001-2006 GMC Yukon8 Cyl 8.1L3/4 TON, XL 3/4 TON

  • Customer Questions & Expert Answers

    Q:
    I am wonder if this is complete and correct part for my vehicle. Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 12587621 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    How to replace rear main oil seal on V8 engine for Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali,Yukon XL? Posted by Customer
    A:
    Remove the transmission and the driveplate. Take a screwdriver and pry the Crankshaft Seal from the rear cover without nicking or scratching the seal bore, or crankshaft. Note how far it is recessed into this housing bore prior to removal so that the new seal can be set at this depth. Grab a shop towel and thoroughly clean out all traces of oil and dirt from the block's seal bore. Do not lubricate the seal or touch the sealing lip. Make sure that it is installed properly as it has reverse-lip design on it. The second requirement is that you must see its part number when this seal has been installed. The best way to do this is to use a tool for installing seals to fit in this new one by pushing the tool onto it until it goes back into its place completely. In case, there isn't an appropriate seal installing instrument, one can take a big drift and softly drive this new seal directly into its bore located near rear cover; after which, flush them together so they appear even with one another. Finally, install drive plate and transmission again.
    Posted by GMPartsGiant Specialist
    Q:
    What are the initial components to be removed for this procedure for the 2007 Chevrolet Silverado? Posted by Customer
    A:
    The initial components to be removed are the crankshaft pulley and the vibration damper.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Crankshaft Seal
    Q:
    What can be used if the proper seal installation tool is unavailable for the 2013 Chevrolet Silverado? Posted by Customer
    A:
    A large drift can be used to carefully drive the new seal squarely into the seal bore and flush with the rear cover.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Crankshaft Seal
    Q:
    What should be done after installing the seal for the 2010 Chevrolet Silverado? Posted by Customer
    A:
    The driveplate and transmission should be installed.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Crankshaft Seal
    Q:
    How should the crankshaft balancer be reinstalled for the 2013 Chevrolet Silverado? Posted by Customer
    A:
    Lubricate the balancer hub with clean engine oil and reinstall the crankshaft balancer. The remainder of installation is the reverse of removal.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Crankshaft Seal
    Q:
    What should you do before reinstalling the vibration damper for the 2010 GMC Sierra? Posted by Customer
    A:
    Before reinstalling the vibration damper, lubricate the seal lips with engine oil.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Crankshaft Seal
    Q:
    What tool can be used to drive the seal in for the 2012 GMC Sierra? Posted by Customer
    A:
    A tool that tightly fits the diameter of the seal can be used with a hammer to drive the seal in.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Crankshaft Seal
    Q:
    How can the oil seal be removed from the cover for the 2011 GMC Sierra? Posted by Customer
    A:
    Carefully pry the oil seal out of the cover with a seal puller or a large screwdriver. Be very careful not to distort the cover or scratch the crankshaft. Wrap the electrician's tape around the tip of the screwdriver to avoid damage to the crankshaft.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Crankshaft Seal
    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 12587621, the Right Choice

Your vehicle deserves only genuine OEM GM parts and accessories. To ensure reliability, purchase GM part # 12587621 Seal,Crankshaft Rear Oil. It is sometimes referred to as GM Crankshaft Seal. Our GM parts and accessories are expedited directly from authorized GM dealers strategically located all across the U.S. and are backed by the manufacturer's 12 month, 12,000 mile warranty. OEM GM parts are the best for restoring your vehicle to factory condition performance. This part fits specific Cadillac Escalade models. It fits Chevrolet Avalanche, Express, Silverado. It also fits GMC Savana, Sierra, Yukon.

Affordable, reliable and built to last, GM part # 12587621 Seal,Crankshaft Rear Oil stands out as the smart option. GMPartsGiant.com is your prime online source with the biggest and best selection of genuine GM parts and accessories at giant discounted prices. We have the OEM GM parts and accessories you need at the wholesale prices. GMPartsGiant.com has you covered no matter what type of GM vehicle you drive. For detailed GMC parts information, click here.

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