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Selected vehicle: 2006 · GMC Yukon XL Denali

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Source reference 10138589

Manufacturer communication — 2006 GMC YUKON DENALI

ReferenceReporter type: ManufacturerSTEERINGSTEERING:HYDRAULIC POWER ASSIST:HOSE

Relation to the target vehicle

  • The source's vehicle field says Yukon; whether it is an XL is not stated.
Model year
Match 2006 — Source vehicle field
Model
Unknown YUKON DENALI — Source vehicle field
Trim
Match Denali — Source vehicle field

What the manufacturer’s document says

05-02-32-008F ・ fault and correction ・ names this vehicle

Applies to

  • Applies to 2003-2006 GMC Yukon, Yukon Denali and Yukon XL.

    the passage
    2003-2006 GMC Yukon, Yukon Denali, Yukon XL

Fault

  • In rare cases, a lack of steering assist when stopped or during parking lot type maneuvers.

    the passage
    In rare cases, customers may comment on a lack of steering assist when stopped or during parking lot type maneuvers.

  • The condition goes away or greatly improves once the vehicle begins to move or is above parking lot speeds.

    the passage
    This condition will go away or greatly improve once the vehicle begins to move or is above parking lot speeds.

Finding the cause

Possible causes

  • The concern can be aggravated by worn tires, low tire air pressure, low power steering pump pressures, and tires larger than stock size.

    the passage
    This concern can be aggravated by worn tires, low tire air pressure, low power steering pump pressures, and tires larger than stock size.

Steps to confirm (in the document’s order)

  1. Perform the Power Steering System Test found in SI and make any necessary repairs based on system diagnosis.

    the passage
    Perform the "Power Steering System Test" found in SI. Make any necessary repairs based on system diagnosis.

  2. To tell whether the vehicle has a 670 gear box, inspect the mounting bolts that attach the stub shaft housing; a 670 gear box will only have 3 mounting bolts.

    the passage
    To determine if the vehicle is equipped with a 670 gear box, inspect the mounting bolts that attach the stub shaft housing. A 670 gear box will only have 3 mounting bolts.

Correction

Repair

  1. If a C/K 1500 Series vehicle is equipped with a 670 gear box, replacing it with a 680 gear box may increase the customer satisfaction.

    the passage
    If a C/K 1500 Series vehicle is equipped with a 670 gear box, replacing it with a 680 gear box may increase the customer satisfaction.

  2. When replacing a 670 gear box with a 680 gear box, the power steering gear, union fitting and both inlet O-ring seals must be replaced.

    the passage
    If replacing a 670 gear box with a 680 gear box, it will be necessary to replace the power steering gear, union fitting and both inlet O-ring seals.

Parts

  • Parts: 88965542 Power Steering Gear, 26025709 Union Fitting, 26001594 Inlet O-ring Seal.

    the passage
    88965542 Power Steering Gear 26025709 Union Fitting 26001594 Inlet O-ring Seal

Part numbers printed in the document

The numbers are as the document prints them. The name and the replacing number are what the pages of GMPartsGiant, a reseller of genuine parts and not GM, state. Aftermarket equivalents are not checked here (the links only search by number). Confirm the fit for the vehicle (VIN) before ordering.

Caution

  • For C/K 1500 series vehicles only: if diagnostics did not lead to any repair, this concern is a normal operating characteristic.

    the passage
    FOR C/K 1500 SERIES VEHICLES ONLY - If diagnostics did not lead to any repair, this concern is a normal operating characteristic.

  • If the stub shaft housing has no mounting bolts or has 4 bolts, do not proceed with this bulletin.

    the passage
    If the stub shaft housing does not have any mounting bolts or has 4 bolts - DO NOT PROCEED WITH THIS BULLETIN.

What is needed

Parts and materials
  • Power steering gear 88965542, union fitting 26025709, both inlet O-ring seals 26001594 (C/K 1500 Series only; when replacing a 670 gear box with a 680 gear box)
Labor time
  • 7421280: Power Steering Pump Replacement (use the published labor operation time; no figure given)
  • 7421740: Steering Gear Replacement (use the published labor operation time; no figure given)
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

    本テクニカルブリテンは、停車時またはパーキングロット操舵時のステアリングアシスト不足の顧客からの指摘を改善するため、パワーステアリングポンプおよびラインを交換する手順を提供するものである。 Machine translation (unreviewed)

    This technical bulletin provides a procedure to replace the power steering pump and line to correct the customers concern of lack of steering assit when stopped or parking lot manuvers.
    Go to this passage in the original

Source

Source
NHTSA Manufacturer Communications
Source reference
10138589
Received by source
2018-05-29
Incident date
Unknown

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Manufacturer communication 10138589 — 2006 GMC YUKON DENALI | FaultCrate