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GMC Yukon XL 2000–2006

GMC Yukon XLModel years 2000–2006

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Common on this vehicle:Loss of engine power, no accelerationWarning lightStalls or shuts offGauge or instrument faultReduced brakingDoes not startSteering effort changeVibration or shudder

Record by record

29 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

How it is said to have ended

  • says it held for a while3
  • says it came back3
  • says it did not fix it16
  • result not stated11

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 (27)

Known issuesReduced Engine Power from throttle body connector crimp, broken wire or grounds7

  1. Owner complaint2003 GMC YUKON XL 2500 ・ 2010-03-10

    Service engine light and reduced power mode episodes since November 2008

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    SINCE NOVEMBER 2008, MY 2003 GMC YUKON XL 2500 HAS HAD EPISODES WHERE THE SERVICE ENGINE LIGHT COMES ON AND THE ENGINE GOES INTO REDUCED POWER MODE.
    Remedy
    I HAVE TAKEN IT TO NUMEROUS GM DEALERS TO FIX THE PROBLEM, AND THEY HAVE REPLACED THE THROTTLE BODY ASSEMBLE AND WIRING HARNESS MULTIPLE TIMES AND THE PROBLEM KEEPS RECURRING.
    Consequence
    THERE HAVE BEEN MANY CLOSE EPISODES WHERE WE WERE ALMOST IN AN ACCIDENT.

  2. Owner complaint2006 GMC YUKON XL ・ 2020-07-27

    Check engine codes returning repeatedly; reduced power mode

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    I WAS DRIVING AND MY CAR WENT INTO REDUCED POWER MODE.
    Remedy
    I'VE SINCE CLEANED THE MASS AIR FLOW SENSOR AND THROTTLE BODY. (1 more)
    Inspection
    I'VE TAKEN IT TO A MECHANIC WHO SAID THAT I DID EVERY STEP THEY'VE WOULD HAVE DONE TO TROUBLESHOOT THIS PROBLEM.

  3. Owner complaint2003 GMC YUKON XL 1500 ・ 2015-09-28

    Check engine light and reduced power warning with complete loss of acceleration, braking and steering

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    WHILE TRAVELING TO WORK MY VEHICLES CHECK ENGINE LIGHT CAME ON AND THE REDUCED POWER WARNING CAME ON AT WHICH TIME I HAD COMPLETE LOSS OF ACCELERATION, COMPLETE LOSS OF BRAKING, AND COMPLETE LOSS OF STEERING POWER. (1 more)
    Remedy
    I HAVE ALREADY REPLACED THE THROTTLE HOUSING AND HARNESS COMPONENTS, ACCELERATION PEDAL SENSOR AND YET THE ISSUE CONTINUES, SOMEONE IS GOING TO ( DIE ) BECAUSE OF GMC'S LACK OF CONCERN AND RESPONSIBILITY TO OWNERS OF THEIR PRODUCTS.

  4. Owner complaint2003 GMC YUKON XL 1500 ・ 2015-02-23

    Reduced engine power and service engine soon signals appearing repeatedly since September 2014

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    "REDUCED ENGINE POWER" AND SERVICE ENGINE SOON SIGNALS APPEAR ON VEHICLE PANEL CAUSING ENGINE POWER TO BE REDUCED IN A MATTER OF SECONDS.
    Remedy
    THROTTLE BODY SENSOR REPLACED TWICE, THROTTLE BODY HARNESS REPLACED, ALL WIRES, AND SENSORS HAVE BEEN CLEANED AND THOROUGHLY INSPECTED.

  5. Owner complaint2004 GMC YUKON XL ・ 2011-09-09

    Reduced power indicator comes on intermittently, vehicle limited to 30 MPH

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    REDUCED POWER INDICATOR ON INFORMATION CENTER COMES ON INTERMITTENTLY, WHEN IT DOES, VEHICLES GOES INTO DEFAULT MODE & CAN GO MAX 30 MPH (= 48.3 km/h) (VERY DANGEROUS, WAS ALMOST REAR ENDED). (1 more)
    Remedy
    HAVE HAD IT @ SEVERAL SHOPS & REPLACED THROTTLE SENSOR, TRACED WIRES, REPLACED GROUNDS, INSPECTED HARNESS BUT DOESN'T SEEM TO HELP.

  6. Owner complaint2003 GMC YUKON XL 1500 ・ 2015-09-15

    Reduced engine power display and accelerator loss

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    I KEEP HAVING THE DISPLAY SAY "REDUCED ENGINE POWER". (2 more)

  7. Owner complaint2003 GMC YUKON XL ・ 2010-09-04

    Stalling and engine power reduced light; code P2135

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

ELECTRICAL SYSTEM8

  1. Owner complaint2003 GMC YUKON XL 1500 ・ 2016-06-16

    Reduced engine power warning light flashing randomly, speed reduced to less than 20 MPH

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    THE CONTACT MENTIONED THAT THE PREVIOUS OWNER OF THE VEHICLE EXPERIENCED A FAILURE WITH THE REDUCED ENGINE POWER WARNING INDICATOR. (1 more)
    Remedy
    THE DEALER REPLACED THE THROTTLE BODY, BUT THE FAILURE CONTINUED BEFORE THE CONTACT OWNED THE VEHICLE. (2 more)
    Outcome
    THE REPAIRS FAILED TO PROVIDE A PERMANENT SOLUTION AND THE WARNING LIGHT CONTINUED TO ILLUMINATE FOR THE REDUCED ENGINE POWER.

  2. Owner complaint2004 GMC YUKON XL 1500 ・ 2019-03-12

    Yukon displays reduced engine power and stalls without codes

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    OUR YUKON ON NUMEROUS OCCASIONS WILL JUST DISPLAY REDUCED ENGINE POWER AND SPEED WILL DECREASE RAPIDLY. (2 more)
    Cause
    THAT WAS THE TEMPERATURE CONTROL MODULE FOR THOSE THAT MAY BE EXPERIENCING THIS ISSUE.
    Inspection
    THEY SAY THERE ARE NO CODES.

  3. Owner complaint2004 GMC YUKON DENALI XL ・ 2019-01-20

    Stability control disabled message appears with engine power reduced

    1. 1Fault

    2. 2Finding the cause

      THE ELECTRICAL SYSTEM IS NOT CORRECT -THIS IS VERY DANGEROUS

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    STABILITY CONTROL DISABLED COMES ON WITH ENGINE POWER REDUCED. (1 more)
    Cause
    THE ELECTRICAL SYSTEM IS NOT CORRECT -THIS IS VERY DANGEROUS

  4. Manufacturer communication2005–2006 GMC YUKON XL ・ 2018-06-04(1 earlier editions of this document folded here)

    IP to Body Harness Connector Repair for MIL and DTC P2138

    1. 1Fault

      • The engine warning lamp comes on intermittently with a message or indicator showing Reduced Engine Power.
      • DTC P2138 (Accelerator Pedal Position (APP) Sensor 1-2 Correlation) is set as current or in history.

    2. 2Finding the cause

      Possible causes

      • Water may have entered the instrument panel (IP) to body harness connector, which carries the APP sensor signals to the ECM/PCM.

      Steps to confirm (in the document’s order)

      1. Verify that no aftermarket equipment is electrically connected to the APP sensor signal or low reference circuits, or to any other ECM/PCM 5V reference or low reference circuit.
      2. Locate the IP to body harness connector, which may be in or around the left hand kick panel area or inside the IP.
      3. Inspect for a water leak in the area, using a water hose if necessary to find the source.
      4. Possible water leak points include the A-pillar seals, the sunroof drain lines (if equipped) and the windshield/cowl sealing.
      5. Inspect the terminals of the IP to body harness connector for corrosion and debris.

    3. 3Correction

      Repair

      1. If a water leak is found, repair it as necessary and verify that the repair is effective.
      2. If corrosion or debris is found on the connector terminals, repair as necessary.

      Caution

      • Aftermarket equipment can generate DTC P2138 and/or other DTCs.
    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.
    • Condition：The engine warning lamp comes on intermittently with a message or indicator showing Reduced Engine Power.
    • Condition：DTC P2138 (Accelerator Pedal Position (APP) Sensor 1-2 Correlation) is set as current or in history.
    • Cause：Water may have entered the instrument panel (IP) to body harness connector, which carries the APP sensor signals to the ECM/PCM.
    • Caution：Aftermarket equipment can generate DTC P2138 and/or other DTCs.
    • Confirm：Verify that no aftermarket equipment is electrically connected to the APP sensor signal or low reference circuits, or to any other ECM/PCM 5V reference or low reference circuit.
    • Confirm：Locate the IP to body harness connector, which may be in or around the left hand kick panel area or inside the IP.
    • Confirm：Inspect for a water leak in the area, using a water hose if necessary to find the source.
    • Confirm：Possible water leak points include the A-pillar seals, the sunroof drain lines (if equipped) and the windshield/cowl sealing.
    • Repair：If a water leak is found, repair it as necessary and verify that the repair is effective.
    • Confirm：Inspect the terminals of the IP to body harness connector for corrosion and debris.
    • Repair：If corrosion or debris is found on the connector terminals, repair as necessary.

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

    Remedy
    This technical bulletin provides repair information for repairing the IP to body harness connector to correct a customer concern for intermittent Malfunction Indicator Lamp (MIL) illuminated with Reduced Engine Power displayed and DTC P2138 set.

  5. Manufacturer communication2005 GMC YUKON XL ・ 2018-05-21(1 earlier editions of this document folded here)

    Throttle Position Sensor Cover Replacement

    1. 1Fault

      • The malfunction indicator lamp (MIL) is illuminated with a Reduced Engine Power message displayed.
      • A scan tool may show DTC P2135: Throttle Position (TP) Sensor 1-2 Correlation set as Current or in History.

    2. 2Finding the cause

      Possible causes

      • The condition may be caused by the difference between TP Sensor 1 and TP Sensor 2 exceeding a calibrated value for more than 2 seconds.

      Steps to confirm (in the document’s order)

      1. After installing the new cover, if the scan tool TP Sensor 1 and 2 Agree/Disagree parameter displays Disagree, replace the throttle body assembly.
      2. If DTC P1516, P2101 and/or P2176 are set, replace the throttle body.

    3. 3Correction

      Repair

      1. Clean the throttle body bore and throttle plate with a clean shop towel and GM Top Engine Cleaner, P/N 1052626 (in Canada, P/N 993026), or ACDelco Upper Engine and Fuel Injector Cleaner, P/N 88861803, or an equivalent product.
      2. Remove the old TP sensor cover from the throttle body: grasp the cover, carefully lift it up and separate it from the throttle body.
      3. Tighten the throttle body fasteners to 89 lb in (= 10.1 N·m) (the text prints the metric value as "10 Y").
      4. Reprogram the ECM using the Service Programming System (SPS) with the latest calibration available on TIS2WEB.
      5. Perform the Throttle Learn Reset Procedure.

      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.

      Parts

      • Part number 19259452, Throttle Position (TP) Sensor Cover, quantity 1.

      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

      • Do not replace the throttle body; follow the procedure in the bulletin instead.
      • If the throttle body is dropped at any time during the procedure, abort the procedure and replace it with a new throttle body assembly.
    Read the sentences of the record

    From the manufacturer’s document

    • Applies to：The Yukon entries are 2008-2011 GMC Canyon, Savana, Sierra, Sierra Denali and Yukon models (note: earlier Yukon model years are not listed).
    • Condition：The malfunction indicator lamp (MIL) is illuminated with a Reduced Engine Power message displayed.
    • Condition：A scan tool may show DTC P2135: Throttle Position (TP) Sensor 1-2 Correlation set as Current or in History.
    • Cause：The condition may be caused by the difference between TP Sensor 1 and TP Sensor 2 exceeding a calibrated value for more than 2 seconds.
    • Caution：Do not replace the throttle body; follow the procedure in the bulletin instead.
    • Repair：Clean the throttle body bore and throttle plate with a clean shop towel and GM Top Engine Cleaner, P/N 1052626 (in Canada, P/N 993026), or ACDelco Upper Engine and Fuel Injector Cleaner, P/N 88861803, or an equivalent product.
    • Repair：Remove the old TP sensor cover from the throttle body: grasp the cover, carefully lift it up and separate it from the throttle body.
    • Caution：If the throttle body is dropped at any time during the procedure, abort the procedure and replace it with a new throttle body assembly.
    • Confirm：After installing the new cover, if the scan tool TP Sensor 1 and 2 Agree/Disagree parameter displays Disagree, replace the throttle body assembly.
    • Confirm：If DTC P1516, P2101 and/or P2176 are set, replace the throttle body.
    • Repair：Tighten the throttle body fasteners to 89 lb in (= 10.1 N·m) (the text prints the metric value as "10 Y").
    • Repair：Reprogram the ECM using the Service Programming System (SPS) with the latest calibration available on TIS2WEB.
    • Repair：Perform the Throttle Learn Reset Procedure.
    • Parts：Part number 19259452, Throttle Position (TP) Sensor Cover, quantity 1.

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

    Remedy
    This technical bulletin provides a procedure for replacing the throttle position sensor cover for concerns regarding a indicator lamp illuminated reduced power message displayed and DTC P2135 set.

  6. Owner complaint2003 GMC YUKON DENALI XL ・ 2011-01-09

    Reduced Engine Power and Stability Control Disengaged message displayed

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    "REDUCED ENGINE POWER/STALILITY CONTROL DISENGAGED" MESSAGE DISPLAYED, ENGINE WENT TO IDLE AND WOULD NOT EXCEED 5-10 MPH (= 8.05–16.1 km/h). (1 more)
    Cause
    INFORMATION RECEIVED FORM VARIOUS FORUMS STATE IT IS BELIEVED TO BE WITHIN THE WIRING HARNESS FOR THE THROTTLE POSITION SENSOR.

  7. Manufacturer communication2005–2006 GMC YUKON XL 2500 ・ 2009-06-02

    Intermittent MIL/DTC P2138 with Reduced Engine Power

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Remedy
    GENERAL MOTORS: INTERMITTENT MIL/SES/ DTC P2138 WITH REDUCED ENGINE POWER (REPAIR INSTRUMENT PANEL (IP) TO BODY HARNESS CONNECTOR). 2005-08 GM PASSENGERS CARS/LIGHT DUTY TRUCKS (INCL. SATURNS). *PE UPDATED 11/5/10. *PE UPDATED 4/4/11. *PE UPDATED 2/3/16. *PE

  8. Owner complaint2003 GMC YUKON XL 1500 ・ 2006-09-06

    Engine sluggish with reduced power message, then stall while driving

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    I PULLED OUT OF MY DRIVEWAY IN MY 2003 GMC YUKON XL AND ONLY WENT A SHORT DISTANCE WHEN I NOTICED THE ENGINE WAS VERY SLUGGISH AND THE DIC SHOWED "REDUCED ENGINE POWER". (1 more)
    Inspection
    THE MECHANIC THAT TOWED IT READ THE DTC'S AND FOUND THE FOLLOWING: -CLASS 2 DATA LINK MALFUNCTION. - BODY CONTROL MODULE. - PCM TO TAC MODULE SERIAL DATA CONNECTION.
    Consequence
    I LOST ALL ABILITY TO MANEUVER THE VEHICLE.

ENGINE AND ENGINE COOLING4

  1. Owner complaint2004 GMC YUKON DENALI XL ・ 2011-06-24

    Stability system disabled and engine power warning

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    WHILE DRIVING ON HIGHWAY OR WITHIN CITY, THE TRUCK DISPLAYS A WARNING "STABILITY SYSTEM DISABLED, REDUCED ENGINE POWER".
    Remedy
    TO DATE THE THROTTLE BODY HAS BEEN REPLACED HOWEVER THE CONDITION RETURNED 1 WEEK LATER, UNDER NORMAL DRIVING CONDITIONS.

  2. Owner complaint2003 GMC YUKON XL 1500 ・ 2011-06-11

    Engine reduced power message while driving in traffic, loss of vehicle control

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    THIS IS THE SECOND TIME FOR THIS PROBLEM TO OCCUR WITH THIS VEHICLE. (2 more)
    Consequence
    WE HAD TO WORK OUR WAY TO A SAFE AREA TO PARK BECAUSE WE WERE A HAZARD TO OTHER DRIVERS. (1 more)

  3. Manufacturer communication2000–2001 GMC YUKON XL DENALI ・ 2010-03-25

    GM: Loss of Power/Hesitates on Acceleration

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      GM: LOSS OF POWER HESITATES ON ACCELERATION. 4.3, 4.8, 5.3, 5.7 AND 6.0 ENGINES COUPLED WITH THE 4L60E OR 4L65E MAY EXPERIENCE A CONDITION OF HESITATES, MISSES OR LOSS OF POWER UNDER ACCELERATION. THE VEHICLE MAY OPERATE AS IF IT IS IN REDUCED POWER MODE. *PE

    Read the sentences of the record
    Remedy
    GM: LOSS OF POWER HESITATES ON ACCELERATION. 4.3, 4.8, 5.3, 5.7 AND 6.0 ENGINES COUPLED WITH THE 4L60E OR 4L65E MAY EXPERIENCE A CONDITION OF HESITATES, MISSES OR LOSS OF POWER UNDER ACCELERATION. THE VEHICLE MAY OPERATE AS IF IT IS IN REDUCED POWER MODE. *PE

  4. Owner complaint2001 GMC YUKON XL ・ 2006-12-12

    Check engine and reduced engine power lights with reduced speed operation

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    DT*: THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS, THE CHECK ENGINE AND REDUCED ENGINE POWER LIGHT ILLUMINATED FOLLOWED BY THE VEHICLE OPERATING AT A REDUCED SPEED.
    Inspection
    THE VEHICLE WAS INSPECTED BY A DEALER WHO DETERMINED THE THROTTLE CONTROL MODULE AND APP SENSOR ASSEMBLY OF THE ENGINE NEEDED TO BE REPLACED. (1 more)

ELECTRONIC STABILITY CONTROL (ESC)3

  1. Owner complaint2004 GMC YUKON XL 1500 ・ 2016-01-06

    Engine stall and loss of power while driving at 60 MPH

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3CorrectionNot repaired

      THE VEHICLE WAS NOT REPAIRED.

    Read the sentences of the record
    Fault
    THE ENGINE STALLED AND LOST POWER. (1 more)
    Remedy
    THE VEHICLE WAS NOT REPAIRED.
    Inspection
    THE VEHICLE WAS TAKEN TO A LOCAL DEALER WHO WAS UNABLE TO DUPLICATE AND DIAGNOSE THE FAILURE.

  2. Owner complaint2006 GMC YUKON XL 2500 ・ 2015-12-16

    Reduced engine power warning while driving at highway speed

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    ON APRIL 2 2015 I EXPERIENCED "REDUCED ENGINE POWER" WHILE TAKING MY DAUGHTER TO URGENT CARE. (2 more)
    Consequence
    NUMEROUS TIMES, WE HAVE COME CLOSE TO BEING INVOLVED IN AN ACCIDENT WHEN IT OCCURS.

  3. Owner complaint2003 GMC YUKON XL DENALI ・ 2012-12-18

    Power loss at 65 mph on highway, reduced engine power message, codes cleared but symptom persists

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    DRIVING 65 MPH (= 104.6 km/h) ON THE HIGHWAY AND ALL OF A SUDDEN MY CAR LOSES POWER. (2 more)
    Outcome
    I GOT EVERYTHING DONE THAT WAS SUGGESTED THE CODES ARE GONE AND IT'S STILL HAPPENING!!

ENGINE3

  1. Owner complaint2003 GMC YUKON DENALI XL ・ 2014-11-23

    Vehicle powers down without pattern, reduced engine power light on, steering and brakes hard

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

    Read the sentences of the record
    Fault
    VEHICLE POWERS DOWN WITHOUT ANY PATTERN, RHYME OR REASON. (5 more)
    Remedy
    I HAVE REPLACED THE BATTERY, THROTTLE BODY ASSEMBLY AND WIRING HARNESS TWICE. (2 more)
    Consequence
    IT PUT ME IN THE DITCH. (1 more)

  2. Owner complaint2004 GMC YUKON XL 1500 ・ 2015-11-04

    Unexpected engine power reduction during highway and city driving

    1. 1Fault

    2. 2Finding the cause

      Not stated

    3. 3Correction

      THEY KEEP REPLACING DIFFERENT PARTS THINKING THAT IT WOULD FIX THE PROBLEM.

    Read the sentences of the record
    Fault
    WHEN DRIVING WHETHER HIGHWAY OR CITY STREETS, THE CAR WILL WITHOUT NOTICE SLOW DOWN TO ABOUT 15MPH (= 24.1 km/h). (2 more)
    Remedy
    THEY KEEP REPLACING DIFFERENT PARTS THINKING THAT IT WOULD FIX THE PROBLEM.

  3. Owner complaint2001 GMC YUKON XL 1500 ・ 2015-07-10

    Reduced engine power error while driving on expressway

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

    Read the sentences of the record
    Fault
    I PULLED OVER AND THE REDUCED ENGINE POWER ERROR WAS ILLUMINATED.
    Remedy
    IT WAS REPLACED, BUT I WAS CONCERNED ABOUT THE THROTTLE BODY AS WELL.
    Inspection
    MY MECHANIC NARROWED THE PROBLEM DOWN TO THE ACCELERATOR SENSOR LOCATED ON THE GAS PEDAL.

FUEL SYSTEM, GASOLINE1

  1. Owner complaint2004 GMC YUKON XL ・ 2009-09-29

    Power loss at highway speed with engine light and reduced power light on

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    I WAS DRIVING ON DELAWARE ROUTE # 1 DOING THE SPEED LIMIT (65MPH (= 104.6 km/h)) IN MY 2004 GMC YUKONXL WHEN I LOST POWER TO THE VEHICLE. (1 more)
    Inspection
    I EXPLAINED MY SITUATION AND WAS TOLD THAT I PROBABLY HAD A BAD THROTTLE BODY (CARBURETOR) AND THAT IT WOULD HAVE TO BE REPLACED.

FUEL/PROPULSION SYSTEM1

  1. Owner complaint2003 GMC YUKON XL 1500 ・ 2015-09-23

    Error message displays on dash

    1. 1Fault

    2. 2Finding the cause

    3. 3Correction

      Not stated

    Read the sentences of the record
    Fault
    THERE IS AN ERROR MESSAGE THAT DISPLAYS ON THE DASH FOR MYSELF AND THOUSANDS OF OTHERS WHO OWN GMC/CHEVY TRUCKS WITH THESE MOTORS.

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2 owner complaints have no classified sentences yet, so their causes and repairs are not picked out. Their text is in the list of records.