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Selected vehicle: 2006 · GMC Yukon XL Denali

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Source reference 10129889

Manufacturer communication — 2006 GMC YUKON DENALI

ReferenceReporter type: ManufacturerSTRUCTURE

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

PIT3098F ・ fault and correction ・ names this vehicle

Applies to

  • Applies to 1999 - 2006 GMC Yukon models.

    the passage
    GMC Yukon Models 1999 - 2006

  • Vehicles with torsion bar front suspension are covered.

    the passage
    With Torsion Bar Front Suspension

Fault

  • The procedure is for customer complaints of the vehicle leaning left or right.

    the passage
    This procedure should be followed to diagnose and correct customer complaints of vehicle leaning left or right.

Finding the cause

Steps to confirm (in the document’s order)

  1. Measure the fender wheel-opening heights, front and rear, to quantify the lean.

    the passage
    Measure fender wheel-opening heights, front and rear, to quantify vehicle lean.

  2. P height (front) and R height (rear) are the distance from the ground to the highest point of the wheel-opening, through the center of the wheel.

    the passage
    They are the distance from the ground to the highest point on their respective wheel-opening, going through the center of their respective wheel.

  3. Before measuring, set the tire pressures to the pressure shown on the certification label.

    the passage
    Set the tire pressures to the pressure shown on the certification label.

  4. Before measuring, check the fuel level and add weight if necessary to simulate a full tank.

    the passage
    Check the fuel level. Add additional weight if necessary to simulate a full tank.

  5. If the left-to-right difference in P and/or R height is 1/2 inch (12 mm) or less, the vehicle is within specification and no repair is suggested.

    the passage
    If the difference left to right, P and or R height is 1/2 inch (12 mm) or less no repairs are suggested as the vehicle is within specification.

Correction

Repair

  1. The vehicle's stance can generally be adjusted with the torsion bar adjuster bolts.

    the passage
    Generally the vehicle's stance can be adjusted with the torsion bar adjuster bolts.

  2. If Z height is out of spec and the D height difference is greater than 1/2 inch (12 mm), adjust Z height until it is within spec and the P and R height differences are less than 1/2 inch (12 mm).

    the passage
    If Z height is out of spec and D height delta is greater than 1/2 inch (12 mm), adjust Z height until it is within spec and P and R height deltas are less than 1/2 inch (12 mm).

  3. If adjustment is not possible, check the front eye of the rear leaf springs for matching color-coded tape or paint: if the colors differ, switch the springs side to side; if they match, replace the leaf spring on the lower side only.

    the passage
    If this is not possible, check front eye of rear leaf spring for matching color-coded tape or paint. Both sides should be the same color. If not, switch springs side to side. If so, replace leaf spring on lower side only.

  4. After all adjustments, perform a front-end alignment and check headlight aim.

    the passage
    After all adjustments are done, perform a front-end alignment and check headlight aim.

What is needed

Parts and materials
  • Rear leaf spring (lower side only; when adjusting Z height cannot bring the left-to-right height difference within limits and both springs carry the same color code; if the colors differ, switch the springs side to side)
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

    本予備情報通知は、左右に傾いている車両に関する情報を整備士に提供するものです。整備士は車体の傾きを定量化するために、前後のフェンダーホイールオープニング高さを測定する必要があります。フェンダーホイールオープニング高さはトリム高さに関連していますが、異なるものです。前部ホイールオープニング高さはP高さとして知られ、後部ホイールオープニング高さはR高さとして知られています。仕様外の高さを調整してください。すべての調整が完了した後、フロントエンドアライメントを実施し、ヘッドライトの照準を確認してください。 Machine translation (unreviewed)

    This Preliminary Information communication provides information to the technician about vehicles that have a lean to the left or right. Technician will need to measure fender wheel-opening heights, front and rear, to quantify vehicle lean. Fender wheel-opening heights are related to, but distinct from, trim height. The front wheel-opening height is known as P height, and the rear wheel-opening height is known as R height. Adjust and heights that are out of specification. After all adjustments are done, perform a front-end alignment and check headlight aim.
    Go to this passage in the original

Source

Source
NHTSA Manufacturer Communications
Source reference
10129889
Received by source
2018-03-12
Incident date
Unknown

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