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GMC Yukon 2000–2006

GMC YukonModel years 2000–2006

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2 conditions added

Common on this vehicle:NoiseVibration or shudderLeakGauge or instrument faultSteering effort changeLoss of engine power, no accelerationReduced brakingAir conditioning or heater

Record by record

8 records state a cause or a remedy. Each record is shown as short labels in the order fault → finding the cause → correction. Press a label to narrow to the records that state it.

Symptom

Component named as the cause

Work done

A ribbon is as wide as the records that state both of its ends (only the commonest are drawn). A record that names several symptoms or components runs through each. Orange is records that say the fault came back or was not fixed. Results come from owners’ reports only; one that does not say is “result not stated”. None of this is a likelihood of a cause or a rate at which work succeeds.

Read the records one by one (7)

Known issuesHydro-boost brake assist and power steering share one hydraulic supply (four campaigns)2

  1. Recall2006 GMC YUKON ・ 2005-05-10

    Power Steering Hose Fracture

    1. 1Fault

      • Under extreme steering maneuvers, such as turning the steering wheel fully left or right while braking, the hose may fracture and leak fluid; power steering assist would be lost and steering effort would increase.
      • On vehicles with hydro-boost power brakes it could also result in loss of power brake assist and increased braking effort; if the fluid sprays onto hot engine parts, an engine compartment fire could occur.
      • With the Hydroboost braking system, braking assist will be limited to the reserve power assist system; the braking systems on vehicles without Hydroboost are unaffected.

    2. 2Finding the cause

      Possible causes

      • The high pressure power-steering hose was manufactured with an incorrect compound, making it susceptible to high pressure failure at the elevated fluid temperatures and pressures that can occur during simultaneous braking and steering inputs.

      Steps to confirm (in the document’s order)

      1. Inspect and record the date code on the power steering pressure line; it is printed on the hose and repeated approximately every 6 inches (150 mm).
      2. Vehicles with the hydro-boost system have two hoses to inspect, others only one; the conduit may have to be removed to read the date code.
      3. The suspect date codes are 07135F-2 and 07145F-2; if the hose carries one of them, it must be replaced.

    3. 3Correction

      Repair

      1. If the date code is not one of the listed codes, replace the conduit if applicable; no further action is required.
      2. For Silverado/Tahoe/Sierra/Yukon/Escalade, hose replacement follows SI documents 756552 (Non Hydro-Boost Pressure line), 651043 (Power Steering Pump to Hydro-Boost Pressure line) and 651019 (Hydro-Boost to Steering Gear Pressure Line).

      Parts

      • Less than 10% of the involved vehicles will require hose replacement; if parts are required, the appropriate hose(s) are ordered from GMSPO.

      Caution

      • This bulletin is a revision to address hoses used to service 1991-2006 vehicles; dealers who ordered these hoses for service are identified in the attachment to the administrative message.
      • Vehicle eligibility should be confirmed through GMVIS before beginning recall repairs; not all vehicles within the breakpoints may be involved.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to certain 2005 Chevrolet Corvette, Silverado and GMC Sierra, and 2006 Buick Rainier, Cadillac Escalade, Chevrolet Corvette, Express, Silverado, Tahoe, TrailBlazer, TrailBlazer EXT, GMC Envoy, Envoy XL, Savana, Sierra, Yukon and HUMMER H2.
    • Applies to：For the 2006 GMC Yukon the VIN breakpoints are 6R104469 through 6R120468.
    • Applies to：Some of the affected hoses were shipped to dealers by GMSPO between July 25, 2005 and August 24, 2005 and could have been used to service 1991-2006 vehicles.
    • Cause：The high pressure power-steering hose was manufactured with an incorrect compound, making it susceptible to high pressure failure at the elevated fluid temperatures and pressures that can occur during simultaneous braking and steering inputs.
    • Condition：Under extreme steering maneuvers, such as turning the steering wheel fully left or right while braking, the hose may fracture and leak fluid; power steering assist would be lost and steering effort would increase.
    • Condition：On vehicles with hydro-boost power brakes it could also result in loss of power brake assist and increased braking effort; if the fluid sprays onto hot engine parts, an engine compartment fire could occur.
    • Condition：With the Hydroboost braking system, braking assist will be limited to the reserve power assist system; the braking systems on vehicles without Hydroboost are unaffected.
    • Confirm：Inspect and record the date code on the power steering pressure line; it is printed on the hose and repeated approximately every 6 inches (150 mm).
    • Confirm：Vehicles with the hydro-boost system have two hoses to inspect, others only one; the conduit may have to be removed to read the date code.
    • Confirm：The suspect date codes are 07135F-2 and 07145F-2; if the hose carries one of them, it must be replaced.
    • Repair：If the date code is not one of the listed codes, replace the conduit if applicable; no further action is required.
    • Repair：For Silverado/Tahoe/Sierra/Yukon/Escalade, hose replacement follows SI documents 756552 (Non Hydro-Boost Pressure line), 651043 (Power Steering Pump to Hydro-Boost Pressure line) and 651019 (Hydro-Boost to Steering Gear Pressure Line).
    • Parts：Less than 10% of the involved vehicles will require hose replacement; if parts are required, the appropriate hose(s) are ordered from GMSPO.
    • Caution：This bulletin is a revision to address hoses used to service 1991-2006 vehicles; dealers who ordered these hoses for service are identified in the attachment to the administrative message.
    • Caution：Vehicle eligibility should be confirmed through GMVIS before beginning recall repairs; not all vehicles within the breakpoints may be involved.
    Cause
    CERTAIN PASSENGER VEHICLES MAY HAVE BEEN BUILT WITH A POWER STEERING HOSE THAT IS NOT TO SPECIFICATION. UNDER EXTREME STEERING MANEUVERS, SUCH AS TURNING THE STEERING WHEEL FULLY TO THE LEFT OR RIGHT WHILE BRAKING, THE HOSE MAY FRACTURE AND LEAK FLUID.
    Remedy
    DEALERS WILL INSPECT THE POWER STEERING HOSE(S) FOR TWO SUSPECT DATE CODES AND REPLACE THEM IF REQUIRED. THE RECALL WILL BEGIN ON OCTOBER 14, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, BUICK AT 1-866-608-8080, CADILLAC AT 1-866-982-2339, ISUZU AT 1-800-255-6727, OR HUMMER AT 1-800-732-5493.
    Consequence
    IF THIS WERE TO OCCUR, POWER STEERING ASSIST WOULD BE LOST AND INCREASED STEERING EFFORT WOULD BE REQUIRED. ON VEHICLES EQUIPPED WITH HYDRO-BOOST POWER BRAKES, IT COULD ALSO RESULT IN LOSS OF POWER BRAKE ASSIST AND INCREASED BRAKING EFFORT WOULD BE REQUIRED. IF THE POWER STEERING FLUID SPRAY WERE TO SPRAY ONTO HOT ENGINE PARTS, AN ENGINE COMPARTMENT FIRE COULD OCCUR.

  2. Recall2006 GMC YUKON ・ 2005-10-07

    Power steering hose fracture risk recall

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

      What the documents say to do

      Hydro-boost brake assist and power steering share one hydraulic supply (four campaigns)

      Confirm

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

      Repair

      1. Dealers replace the hydro-boost relief valve.
      2. Dealers test the hydro-boost assembly for functional operation and replace it if it fails.

      Caution

      • An inoperative pump raises steering and braking effort but does not completely remove the ability to steer or slow the vehicle.
    Read the sentences of the record
    Cause
    Certain vehicles may have been built with a power steering hose that is not to specification. Under extreme steering manoeuvres, such as turning the steering wheel fully to the left or right while braking, the hose may fracture and leak fluid. If this were to occur, power steering assist would be lost and increased steering effort would be required. On vehicles equipped with hydro-boost power brakes, it could also result in loss of power brake assist and increase braking effort would be required. If power steering fluid were to spray onto hot engine parts, an engine compartment fire could occur. Correction: Dealers will inspect the power steering hose(s) for two suspect date codes and replace them if required.

STEERING4

  1. Manufacturer communication2006 GMC YUKON DENALI ・ 2020-08-10(1 earlier editions of this document folded here)

    Power Steering Noise at Low Temperatures - Technical Bulletin

    1. 1Fault

      • Noise or a fluid leak from the power steering pump, gear or high pressure side hose during extreme low outdoor temperature operation.

    2. 2Finding the cause

      Possible causes

      • At -30°C (-22°F) or lower the power steering fluid may thicken and system pressures may rise, potentially causing noise or damage to components.

    3. 3Correction

      Repair

      • Replace any damaged power steering components, flush the system and refill with Cold Climate power steering fluid.

      Parts

      • P/N 12345866 (in Canada 10953484): 16 oz. bottle Power Steering Fluid - Cold Climate.
      • P/N 12345867 (in Canada 10953471): 32 oz. bottle Power Steering Fluid - Cold Climate.

      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

      • In some extreme operating conditions this fluid may not correct the condition.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2014 and prior GM passenger cars and light duty trucks.
    • Condition：Noise or a fluid leak from the power steering pump, gear or high pressure side hose during extreme low outdoor temperature operation.
    • Cause：At -30°C (-22°F) or lower the power steering fluid may thicken and system pressures may rise, potentially causing noise or damage to components.
    • Repair：Replace any damaged power steering components, flush the system and refill with Cold Climate power steering fluid.
    • Caution：In some extreme operating conditions this fluid may not correct the condition.
    • Parts：P/N 12345866 (in Canada 10953484): 16 oz. bottle Power Steering Fluid - Cold Climate.
    • Parts：P/N 12345867 (in Canada 10953471): 32 oz. bottle Power Steering Fluid - Cold Climate.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This technical bulletin provides a procedure to eliminate a power steering noise due to extremely low temperatures.

  2. Manufacturer communication2006 GMC YUKON DENALI ・ 2018-05-21

    Power Steering Fluid Leak at Fluid Reservoir Diagnosis

    1. 1Fault

      • When diagnosing a power steering fluid leak, the technician may find a heat damaged fluid reservoir.

    2. 2Finding the cause

      Possible causes

      • Super heated power steering fluid may affect the pump, reservoir and hoses, and these parts may show no apparent issue at the initial diagnosis.
      • Fluid temperatures high enough to distort or damage the reservoir may damage the power steering pump and affect its durability.

    3. 3Correction

      Repair

      • When replacing a reservoir for a leak that appears to be caused by super heated fluid, also replace the power steering pump and hoses.

      Caution

      • Advise the customer not to hold the steering against the stop or end of travel for more than 5 seconds at an engine speed above 1,500 rpm.
      • Continuous spin-outs or "doughnuts" with the steering at or near the end of travel for more than 5 seconds at a time above 1,500 rpm also overheat the fluid.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：Applies to 2018 and prior GM passenger cars and light duty trucks equipped with hydraulic power steering.
    • Condition：When diagnosing a power steering fluid leak, the technician may find a heat damaged fluid reservoir.
    • Cause：Super heated power steering fluid may affect the pump, reservoir and hoses, and these parts may show no apparent issue at the initial diagnosis.
    • Cause：Fluid temperatures high enough to distort or damage the reservoir may damage the power steering pump and affect its durability.
    • Repair：When replacing a reservoir for a leak that appears to be caused by super heated fluid, also replace the power steering pump and hoses.
    • Caution：Advise the customer not to hold the steering against the stop or end of travel for more than 5 seconds at an engine speed above 1,500 rpm.
    • Caution：Continuous spin-outs or "doughnuts" with the steering at or near the end of travel for more than 5 seconds at a time above 1,500 rpm also overheat the fluid.

    Open the manufacturer’s document (PDF) ↗ The points above were read from this document.

    Remedy
    This preliminary information bulletin provides information for diagnosing a power steering fluid leak at the fluid reservoir.

  3. Manufacturer communication2003–2004 GMC YUKON ・ 2004-07-19

    Power steering fluid leaking at hydraulic brake booster

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      POWER STEERING FLUID LEAKING AT HYDRAULIC BRAKE BOOSTER. *TT

    Read the sentences of the record
    Remedy
    POWER STEERING FLUID LEAKING AT HYDRAULIC BRAKE BOOSTER. *TT

  4. Owner complaint2001 GMC YUKON ・ 2001-04-18

    Tilt steering wheel locks in up position

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    TILT STEERING WHEEL LOCKS IN UP POSITION.

SERVICE BRAKES, HYDRAULIC1

  1. Owner complaint2004 GMC YUKON ・ 2008-04-08

    Hydro boost leak under hood

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    THE CONTACT NOTICED A LEAK UNDER THE HOOD OF HIS VEHICLE.

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