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Hummer 20881337 GENERATOR Assembly

2008-2010 Hummer

Customer Questions & Expert Answers (12)
GM 20881337 GENERATOR Assembly
GM 20881337 GENERATOR Assembly
GM 20881337 GENERATOR Assembly
GM 20881337 GENERATOR Assembly
GM 20881337 GENERATOR Assembly
GM 20881337 GENERATOR Assembly
GM 20881337 GENERATOR Assembly
GM 20881337 GENERATOR Assembly
  • Part Description
    Generator Asm ; Generator, Engine Electrical
  • Replaces
    25968616, 25869451, 15905872, 22781127, 15905874
  • Manufacturer
    General Motors
Make sure this part fits
$242.26 MSRP: $491.60
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine Hummer
    Manufacturer Part Number20881337
    Part DescriptionGenerator Asm ; Generator, Engine Electrical
    Other NamesAlternator
    Item Dimensions9.4 x 8.2 x 7.8 inches
    Item Weight16.20 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces25968616, 25869451, 15905872, 22781127, 15905874
    ManufacturerGeneral Motors
    SKU20881337
    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
    2008-2010 Hummer H38 Cyl 5.3LCREW CAB, SUV
    2009-2010 Hummer H3T8 Cyl 5.3LCREW CAB, SUV

  • Customer Questions & Expert Answers

    Q:
    I would like to confirm if this is the correct part number for my vehicle. Please advise. Thank you. Posted by GMPartsGiant Specialist
    A:
    You can Select Your Vehicle to check if 20881337 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    How to remove and install an alternator in a Cadillac Escalade? Posted by Customer
    A:
    Disconnect the cable from the negative battery terminal. Remove the air intake duct. Remove the drivebelt. On 6.0L models, remove the engine cover. Peel back the weather boot from the B+ terminal, remove the nut and disconnect the battery cable from the alternator. Disconnect the electrical connector from the alternator. Remove the two alternator mounting bolts. To detach the alternator from 6.0L models, remove these two bolts. Remove the alternator. Installation is the reverse of removal. Be sure to tighten the alternator mounting bolts.
    Posted by GMPartsGiant Specialist
    Q:
    How to Remove the Alternator on Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL? Posted by Customer
    A:
    To remove the alternator on a V6 model, start by disconnecting the cable from the negative battery terminal and removing the air intake duct and accessory drive belt. Unbolt the clamp that secures the heater outlet hose to the alternator mounting bracket, disconnect the electrical connector from the alternator, and peel back the weather boot from the B+ terminal to remove the battery cable from the alternator. Finally, remove the alternator mounting bolts and the alternator. The installation is the reverse of removal. On V8 models, follow similar removal steps as the V6 models. Again, installation is the reverse of removal.
    Posted by GMPartsGiant Specialist
    Q:
    What should be done after disconnecting the battery cable for the 2008 Chevrolet Colorado? Posted by Customer
    A:
    Remove the drivebelt.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Alternator
    Q:
    What components do you need to remove before replacing the alternator for the 2016 Chevrolet Express? Posted by Customer
    A:
    Remove the coolant reservoir, air filter housing, and upper fan shroud.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Alternator
    Q:
    What should you do next after removing the air intake duct and accessory drivebelt for the 2008 Chevrolet Silverado? Posted by Customer
    A:
    Detach the clip for the engine wiring harness from the air conditioning compressor and condenser hose bracket and remove the bolt from the bracket that secures the air conditioning compressor and condenser hose.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Alternator
    Q:
    How do you start removing the alternator on the 2013 Chevrolet Suburban? Posted by Customer
    A:
    Start by disconnecting the cable from the negative battery terminal and removing the air intake duct and accessory drivebelt.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Alternator
    Q:
    What should you do after detaching the clip and removing the bolt for the 2012 Chevrolet Tahoe? Posted by Customer
    A:
    Unbolt the clamp that secures the heater outlet hose to the alternator mounting bracket, disconnect the electrical connector from the alternator, and peel back the weather boot from the B+ terminal to remove the battery cable from the alternator.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Alternator
    Q:
    What steps should be followed for the engine for the 2012 GMC Canyon? Posted by Customer
    A:
    Disconnect the wiring from the alternator and move the wiring harnesses out of the way. If replacing the alternator, take the old one when purchasing a replacement unit. Ensure the new/rebuilt unit looks identical to the old alternator, with the same number, size, and location of terminals. Check the identification numbers stamped into the housing to ensure they match. If the new/rebuilt alternator does not have a pulley installed, switch the pulley from the old unit to the new/rebuilt one. Some shops may perform this service free of charge.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Alternator
    Q:
    How is the process different for the 2012 GMC Sierra? Posted by Customer
    A:
    For a V8 model, instead of detaching the clip and bolt for the air conditioning compressor and condenser hose bracket, you simply peel back the weather boot from the B+ terminal and disconnect the battery cable from the alternator. Then, remove the electrical connector and two alternator mounting bolts before removing the alternator.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Alternator
    Q:
    What should you do after detaching the clip and removing the bolt for the 2011 GMC Yukon? Posted by Customer
    A:
    Unbolt the clamp that secures the heater outlet hose to the alternator mounting bracket, disconnect the electrical connector from the alternator, and peel back the weather boot from the B+ terminal to remove the battery cable from the alternator.
    Posted by GMPartsGiant Specialist
    Q:
    Did the battery need to be removed to replace the alternator? Posted by Customer
    A:
    The battery does not need to be removed but it must be disconnected (taking terminals off the posts)
    Posted by GMPartsGiant Specialist 24/8/2020
    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 20881337, the Right Choice

Your vehicle deserves only genuine OEM GM parts and accessories. To ensure reliability, purchase GM part # 20881337 GENERATOR Assembly. It is sometimes referred to as Hummer Alternator. 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 Hummer H3, H3T models.

Affordable, reliable and built to last, GM part # 20881337 GENERATOR Assembly 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 Hummer parts information, click here.

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