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Selected vehicle: 2006 · GMC Yukon XL Denali

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Source reference 10112519

Manufacturer communication — 2006 GMC YUKON DENALI XL

Fitment confirmedReporter type: ManufacturerSUSPENSION:FRONT:HUBWHEELS:HUB

Relation to the target vehicle

  • The source's vehicle field includes the trim.
Model year
Match 2006 — Source vehicle field
Model
Match YUKON DENALI XL — Source vehicle field
Trim
Match Denali — Source vehicle field

What the manufacturer’s document says

PIT3078F ・ normal characteristic (no repair) ・ names this vehicle

Applies to

  • Applies to 2004-2013 GMC Sierra, Sierra Classic, Yukon and Yukon Denali models (note: the Yukon years run later than the years this service covers).

    the passage
    2004-2013 GMC Sierra, Sierra Classic, Yukon and Yukon Denali Models

Fault

  • Grease may move radially outward from the bearing seal area onto adjoining components.

    the passage
    In addition, grease may move radially outward from this area onto adjoining components, see example picture below.

Finding the cause

Possible causes

  • The factory grease fill of the front bearing/hub assembly is more than the bearing needs for lubrication over the life of the vehicle.

    the passage
    The factory grease fill of the front bearing/hub assembly exceeds the amount of grease that is required for adequate bearing lubrication throughout the life of the vehicle.

  • Part of the grease purges through the self-venting bearing seals during the initial drive period (a few thousand miles/kilometers) and helps form an extra barrier against contamination.

    the passage
    A portion of the grease will purge through the self-venting bearing seals for the initial drive period (a few thousand miles/kilometers) and helps to form an additional barrier to block contamination of the bearing.

Steps to confirm (in the document’s order)

  1. Replace the bearing if its endplay is greater than 0.005" or 0.13mm.

    the passage
    The bearing endplay is greater than 0.005" or 0.13mm

  2. Replace the bearing if the seals show visible damage.

    the passage
    The seals show visible damage

  3. Replace the bearing if it rotates roughly.

    the passage
    The bearing exhibits rough rotation

  4. Replace the bearing if it makes abnormal noise.

    the passage
    The bearing exhibits abnormal noise

Correction

Repair

  • If desired, grease that has migrated away from the immediate seal area can be wiped off.

    the passage
    If desired, any grease that has migrated away from the immediate seal area can be wiped off.

Caution

  • Do not replace the bearing for grease purge, and do not clean the purged grease on or right next to the seals, because it gives additional protection.

    the passage
    Do not replace the bearing for grease purge. Furthermore, do not clean the purged grease from the area immediately on or adjacent to the seals because this grease provides additional protection.

What is needed

Parts and materials
  • Front hub bearing (only if the seals show visible damage, the endplay is greater than 0.005" or 0.13mm, rotation is rough, or there is abnormal noise)
Labor time
Not stated
Special tools
Not stated
Scan tool
Not stated

Only what the technical documents state. "Not stated" does not mean not needed.

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

  1. Communication summary

    本暫定情報通知は、フロントハブベアリングからグリースが漏れている車両について、整備士への情報提供です。整備士はグリースの排出のためにベアリングを交換してはいけません。整備士は、シール周辺またはシール直近から排出されたグリースを直ちに清掃しないよう指導されるべきです。このグリースは追加的な保護を提供するためです。整備士は、シールに目視できる損傷がある場合、ベアリングのエンドプレイが0.005"または0.13mmを超える場合、ベアリングが粗い回転を示す場合、またはベアリングが異常音を示す場合にのみ、ベアリングを交換してください。 Machine translation (unreviewed)

    This Preliminary Information communication provides information to the technician about vehicles that have grease leaking from front hub bearings. Technician should not replace the bearing for grease purge. Technician should be advised to not clean the purged grease from the area immediately on or adjacent to the seals because this grease provides additional protection. Technician should only replace the bearing if the seals show visible damage, bearing endplay is greater than 0.005" or 0.13mm, bearing exhibits rough rotation, or bearing exhibits abnormal noise.
    Go to this passage in the original

Source

Source
NHTSA Manufacturer Communications
Source reference
10112519
Received by source
2017-08-15
Incident date
Unknown

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