Question about 2003 GMC Yukon XL

1 Answer

2003 GMC Denali. Reduced Power Light and power.

Posted by on

  • 3 more comments 
  • rwelshwfg Nov 10, 2010

    Reduced engine power comes on with engine light. Read a lot about people who have had issues. Throttle box and wiring but none seems to have a solution. The dealership even said it wasn't an easy solution. When this issue comes up the vehicle doesn't go beyond 20 mph. After stopping car and shutting off for a few minutes it is ok. Today the engine light came on after the Reduced power message went off and went off after driving 10 minutes

  • rwelshwfg Nov 10, 2010

    No and 118,000

  • rwelshwfg Nov 10, 2010

    Thank you. Do I need to go to the dealer? He said that it was $850. Recommendations?

  • rwelshwfg Nov 10, 2010

    Very helpful!

  • rwelshwfg Nov 10, 2010

    Thank you

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Expert
  • 1,868 Answers

Hello! Can you send a more detailed explanation of the fault...Guru....saailer

Posted on Nov 10, 2010

  • 2 more comments 
  • David Burbee
    David Burbee Nov 10, 2010

    Hello! Thank you...I am working on the problem...saailer

  • David Burbee
    David Burbee Nov 10, 2010

    Hello! Two more questions...Do you have a remote start installed? Does the vehicle have less then 36,000 miles?

  • David Burbee
    David Burbee Nov 10, 2010

    Hello! This problem is well known...Many many owners are having the same fault...It is being caused by a defective Throttle Body...There are Technical Service Bulletins that address the grade of fuel that must be used but GM has not addressed this issue and some dealerships are giving customers the "big spin"...Your vehicle requires 94 octane...Adding an injector cleaner after three fill-ups is a good idea...There is a sensor that is part of the TB (Throttle positioning Sensor TPS) and can not be purchased separately...Vehicles equipped with Electronic Throttle Control (ETC) are built that way...This sensor gets moisture underneath and fails...
    The throttle body cost around $180 and is pictured below...I would suggest buying a new rather than re-built part...After installing a new Throttle Body The problem will go away for a long time...Use top-grade fuel to keep it running clean...Make certain the new TB is equipped with a TPS...

    Guru...................saailer




  • David Burbee
    David Burbee Nov 10, 2010

    Hello! That price is out of line...Part=$200...Labor=2.5 hours @ $95=$237.50 + $200=$437.50...Figuring a higher labor number and an inflated price for the part...A high of $580 would bother me...I would not go to a dealer...Shop around for a competent repair shop...Knowledge is king...You are now equipped with enough data to explain what you want done...Good luck....saailer

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

REDUCED ENGINE POWER ON 2004 YUKON DENALI


throttle position sensor is prob. bad. unfortunately this mean replacing the throttle body

Dec 14, 2013 | 2006 GMC Yukon Xl Denali

1 Answer

2003 denali reduced engine power what is this


By saying " reduced engine power" means a whole world of things. We need details. Help us help you.

Does it studder? Stall? Does it not want to start? What?

Oct 17, 2011 | 2003 GMC Yukon Denali

1 Answer

Reduced engine power in a gmc yukon denali xl


Check all grounds, battery connections. Clean them up and tighen them. If this doens't work, inspect the throttle body for leaks.

Jul 01, 2010 | 2003 GMC Yukon XL

1 Answer

Warning stating reduce engine power and something about stability


Reduced power mode is when the electronic ignition is strategically is not firing all the cylinders to prevent catastrophic failure of your engine. The reason for the GM Engineers put the reduced power mode in the vehicle is so you can drive the vehicle under 50Mph for about 50 miles to a mechanic before the vehicle completely dies.

Jul 01, 2010 | 2003 GMC Yukon Denali

5 Answers

2003 GMC throttle position sensor


I had the same problem with my 2003 denali and came to find out that it was the battery causing the problem. the battery with sufficient power will dictate the tps. if the battery is low or bad, it won't have enough juice to allow the tps to. work. get your battery checked.

Dec 09, 2008 | 2003 GMC Yukon

Not finding what you are looking for?
2003 GMC Yukon XL Logo

Related Topics:

625 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...