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GMC 20768561 Front Drive Axle Inner Shaft

2011-2019 GMC Sierra

Customer Questions & Expert Answers (12)
GM 20768561 Front Drive Axle Inner Shaft
  • Part Description
    Shaft, Front Drive Axle Inner ; Shaft, Front Axle
  • Position
    Front Inner
  • Manufacturer
    General Motors
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  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number20768561
    Part DescriptionShaft, Front Drive Axle Inner ; Shaft, Front Axle
    Other NamesAxle Assembly, Inner Shaft, Output Shaft
    Item Dimensions8.1 x 7.7 x 21.7 inches
    Item Weight3.20 Pounds
    PositionFront Inner
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU20768561
    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
    2011-2019 GMC Sierra8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.6L Diesel1 TON CREW CAB, 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON, CREW CAB 1 TON 137.0, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CAB CHASSIS 1 TON 161.5, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5
  • 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 20768561 fits your vehicle.
    Posted by GMPartsGiant Specialist
    Q:
    What is the function of the driveaxles equipped with sliding constant velocity joints in transmitting power from the front differential/axle to the front wheels for Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL? Posted by Customer
    A:
    Power is transmitted from the front differential/axle to the front wheels through a pair of axle shafts equipped with sliding constant velocity (CV) joints capable of both angular and axial motion. The inner ends of the axle shafts are bolted to an axleshaft connected to the differential side gears, while the outer ends have a stub shaft that is splined to the front hub and bearing assembly and locked in place with a large nut. The outer ends of the axle shafts are equipped with ball-and-cage type CV joints capable of angular but not axial movement. It is important to inspect the boots periodically for damage and leaking lubricant, as torn CV joint boots must be replaced immediately to prevent damage to the joints. If a boot is damaged, the CV joint can be disassembled and cleaned, but if any parts are damaged, the entire axle shaft assembly must be replaced as a unit. Symptoms of worn or damaged CV joints include lubricant leaks, clicking noise in turns, clunk when accelerating after coasting, and vibration at highway speeds. To check for wear in the CV joints and axle shafts, grasp each axle and rotate it in both directions while holding the CV joint housings, feeling for play indicating worn splines or sloppy CV joints. It is also important to check the axle shafts for cracks, dents, and distortion.
    Posted by GMPartsGiant Specialist
    Q:
    How to remove a semi-floating axle shaft for Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL? Posted by Customer
    A:
    To remove a semi-floating axle shaft, first loosen the rear wheel lug nuts and raise the vehicle on jackstands. Drain the differential lubricant and remove the differential cover. Remove the pinion shaft lock screw and withdraw the pinion shaft. For models with a locking differential, rotate the differential until the shaft touches the case for access to the C-locks. Remove the C-lock from the groove on the inner end of the axleshaft and withdraw the shaft, being careful not to damage the oil seal. To install, insert the axleshaft into the housing until it engages with the differential side gear, install the C-lock, and insert the pinion shaft. Install the cover, fill the differential with lubricant, and install the brake disc or drum. For a full-floating axle shaft, remove the bolts attaching the flange to the hub and withdraw the shaft from the housing. To install, hold the axleshaft level to engage the splines and use a new gasket on the flange. Tighten the flange bolts to the proper torque specifications.
    Posted by GMPartsGiant Specialist
    Q:
    What type of front axle assembly is used in the 2012 Chevrolet Silverado? Posted by Customer
    A:
    4WD models use a fully independent front axle assembly.
    Posted by GMPartsGiant Specialist
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    Q:
    What should be done after raising and securing it on jackstands for the 2007 Chevrolet Silverado? Posted by Customer
    A:
    After raising the vehicle and securing it on jackstands, you should pry off the hub cover and remove the driveaxle/hub nut while bracing the hub to prevent it from rotating.
    Posted by GMPartsGiant Specialist
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    Q:
    How should the driveaxle/hub nut and flange bolts be tightened during installation for the 2007 GMC Sierra? Posted by Customer
    A:
    The driveaxle/hub nut (new) and the flange bolts should be tightened to the torque values specifications during installation.
    Posted by GMPartsGiant Specialist
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    Q:
    How do you remove and install components in the front differential for 4WD systems for the 2007 Chevrolet Silverado? Posted by Customer
    A:
    To remove and install components in the front differential for 4WD systems, follow these steps: Remove the bolts securing the axle tube to the differential carrier and the nuts attaching the tube to its support bracket. Carefully remove the output shaft tube, ensuring no components fall out. Mount the tube in a vise and remove the internal components. Measure and remove the axleshaft bearing using a slide hammer and bearing remover attachment. For installation, install the bearing to the original depth using a bearing driver or socket, then install a new seal and deflector, lubricating the seal lips with grease. Carefully drive in the axleshaft, followed by the internal components. Apply RTV sealant to the tube-to-differential housing mating surface, and install the tube assembly, tightening bolts and nuts to specified torques. Reinstall the driveaxle, front axle shift motor, and fill the differential with lubricant.
    Posted by GMPartsGiant Specialist
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    Q:
    How should the rear axle assembly be installed for the 2009 Chevrolet Silverado? Posted by Customer
    A:
    To install the rear axle assembly, the reverse order of removal should be followed. All suspension and brake fasteners should be tightened to the torque value specifications.
    Posted by GMPartsGiant Specialist
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    Q:
    How do you remove and install components in the front differential for AWD systems for the 2012 GMC Sierra? Posted by Customer
    A:
    To remove and install components in the front differential for AWD systems, follow these steps: Remove the stabilizer bar link and, if applicable, the front shock absorber. Unbolt the right driveaxle from the axleshaft flange, supporting it properly. Support the differential carrier with a floor jack and a block of wood. Remove nuts attaching the axle shaft to its support bracket and the bolts securing the axle shaft flange to the differential carrier. Use a brass punch and hammer to separate the axle shaft from the differential case side gear. Remove the inner axle shaft assembly and axle shaft. Replace the inner seal and bearing with a special tool, then apply RTV sealant to the differential sealing surface and install the inner axle shaft housing assembly. Install the axle shaft to the support bracket and align the splines with the differential side gear. Tap the axle shaft with a mallet until the ring (clip) aligns with the groove in the differential case side gear. Install the axle shaft to the inner flange and tighten the bolts. Reinstall the stabilizer link, fill the differential with lubricant, install the differential carrier splash shield, and finally, install the wheel and lug nuts. Lower the vehicle, tighten the lug nuts, and check for proper operation.
    Posted by GMPartsGiant Specialist
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    Q:
    Is overhauling the differential a suitable task for a do-it-yourselfer for the 2013 GMC Sierra? Posted by Customer
    A:
    No, overhauling the differential requires special tools and is not cost-effective for a do-it-yourselfer.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Axle Shaft
    Q:
    What are the initial steps to remove the rear axle assembly from the 2013 GMC Sierra? Posted by Customer
    A:
    The initial steps are to loosen the rear wheel lug nuts, raise the rear of the vehicle, and support it securely on jackstands.
    Posted by GMPartsGiant Specialist
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    Q:
    What needs to be done after removing the differential cover for the 2011 GMC Sierra? Posted by Customer
    A:
    After removing the differential cover, you need to remove the pinion shaft lock screw and withdraw the pinion shaft.
    Posted by GMPartsGiant Specialist
    See expert answers on similar Axle Shaft
    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 20768561, the Right Choice

Your vehicle deserves only genuine OEM GM parts and accessories. To ensure reliability, purchase GM part # 20768561 Front Drive Axle Inner Shaft. It is sometimes referred to as GMC Axle Shaft. 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 GMC Sierra models.

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