Question about 2003 GMC Yukon Denali

2 Answers

2003 GMC Yukon Denali lights flicker

I have a '03 Denali I bought used in July with 130K miles. One of the problems that it has is that the lights flicker, brighter then dimmer, constantly. ALL the lights -- dash, radio, headlights. The alternator tests fine, but you can watch the voltmeter fluctuate. What gives?

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 3,287 Answers

I have the exact same issue with my '04 Envoy. A friend of mine had a similar problem with his '10 Silveradoo. He had the alternator replaced under warranty - only to have the problem return a few months later.

My advice - don't sweat it. Mine has been doing this since I've owned it (7+ years) with no ill effects really. I can see the lights dim and brighten - and even see the voltmeter showing the changing voltage just like you do.

Sorry I don't have a definitive answer for you - but at least you know you're not alone and it isn't an indication of impending doom.

Good luck!

Posted on Jan 10, 2013

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Your problem sounds like a loose connection. Seeing as all the lights are affected it will probably be the feeder supplying the fuse box or three body chassis ground connection.

Posted on Jan 10, 2013

3 Suggested Answers

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

  • 10 Answers

SOURCE: Heated seats won't stay on in 2004 GMC Yukon Denali

See GM TSB 05-08-143-001, If you have Adjustable pedals, especially if they don't work with the memeory buttons, but function with thier own buttons. Its the Brake Pedal Position Sensor is shorted and mesing up the seat module which controls the heaters too. My 05 Suburban had the same issue

Posted on Dec 11, 2009

  • 1 Answer

SOURCE: i have a 2002 gmc yukon denali xl with 6.0L engine

my 2002 had same problems and to fix, I loosened the hose clamp on the throttle body air intake to air box hose. Then opened the butteryfly by hand and used throttle body cleaner, used carb cleaner on another, and removed all the black grime that collects around the throttle body butterfly. About every forty thousand miles i have to do this. I have 123k on mine now and have done it three times. Fixes the low idle, dying in reverse, lite flicker and alternator dropout.

Home it works, if it does
thanks
egwj@aol.com

Posted on Dec 20, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I need to know what transmission is in my 99 gmc Yukon. Or how to find out


Shop for need to know what trans... on Google


Refurbished 1999 Gmc Yukon Transmission ...
$1,199.75
JCWhitney.com Refurbished 2003 Gmc Yukon Xl 1500 ...
$1,529.73
JCWhitney.com Refurbished 2002 Gmc Yukon Transmission ...
$1,199.75
JCWhitney.com Search Results

    I need to find out what transmission is in a 1999 gmc sierra ...

    www.cargurus.com > Questions > GMC > Sierra 1500

    CarGurusApr 7, 2013 - I need to find out what transmission is in a 1999 gmc sierra 1500 pick up 4x4 extended cab. ... Good luck. if the transmission is bad and you KNOW that for a fact, just go ahead and pull it ... My trans went out yesterday and I found one and wantto make sure it fits before I buy it. ... Used GMC Yukon Denali".

    Is The Transmission In A 1999 Gmc Yukon And ... - CarGurus

    www.cargurus.com > Questions > GMC > Yukon Denali

    CarGurusAug 15, 2014 - Is the transmission in a 1999 gmc yukon and a 2000 Yukon Denali the same. ... Does anyone know where I can get a fairly cheap used motor from in or ...Need a good fairly cheap motor for my 99 Gmc Yukon Denali 5.7L V8.

Jan 26, 2016 | GMC Cars & Trucks

1 Answer

Does the Bose system in a 2003 Yukon Denali have a fuse


yes open drivers side front door fuse access panel near door hinge side pull from bottom out look on back side of door for fuse location

Feb 27, 2015 | 2003 GMC Yukon Denali

1 Answer

2003 gmc yukon denali through a mass air flow sensor code changed still having problems with it stuttering to start and while driving on freeway or at stop light when taking off


Trouble codes? If none, then check O2 sensor outputs and replace as needed. Could be a leaking intake manifold gasket if you get "lean banks" codes. This happens in cold winters, but fixes itself in Spring.

Dec 20, 2014 | 2003 GMC Yukon Denali

1 Answer

2003 yukon denali blows room temp air at rear & nothing up front


add 134-a and see if compressor kicks on.

look around for "free AC check" at various shops.

Sorry, it can be a few different things.

Jan 27, 2013 | 2003 GMC Yukon Denali

1 Answer

I have a 2004 Yukon denali and while driving, I got check gas cap alarm. 2 miles later check engine light is on. Checked gas cap, cleaned gasket and tightened. Drove for 2 days. Reset fault and drove 160...


Hello, have you tried to unhook the negative side of the battery for about 10 minutes and then go from there . It should reset the computer completely .

Sep 14, 2011 | 2003 GMC Yukon Denali

2 Answers

Where is the 2003 GMC Yukon Denali XL Cabin Filter


03 denalis do not have one, Gm discontinued them in 03,

Jun 11, 2010 | 2003 GMC Yukon Denali

1 Answer

2003 yukon denali gauges stop working


This model always this problem, usually after about 90,000 miles and the other instruments will eventually follow. There are companies that will repair this for you just use google (instrumentclusters.com) to find them. I was charged 185.00 for the repair... GM wanted over 500.00!

Nov 22, 2009 | 2003 GMC Yukon Denali

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

384 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

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

Answer questions

Manuals & User Guides

Loading...