Question about 2004 GMC Yukon

1 Answer

Headlights dim signifigantly when power windows roll up or down

I have a 2005 GMC yukon. when the power windows are activated, the headlights dim significantly, and they dim really bad when the window is up and you press up or when they are down and you press down. I know that there is no reason to hold the button in either position when the window is in its open or closed position, but if i'm rolling the back windows down i can tell when they are all the way down, because the headlights dim down to about 60% of their max capacity.

Posted by on

  • Ray Keckeisen May 11, 2010

    you need to have the alternator checked,get back to me and we'll go from there, make sure they test it with a load tester

×

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 38 Answers

This should never happen if everything is normal. It sounds like your alternator is bad also have your battery tested. These parts are about six years old and that is when they usually fail. Check your fan belt is tight and not falling apart.

Posted on May 27, 2009

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

Truck lights dim while truck is running


It could be. But first check to make sure the small wire coming from your ground cable to your fender is secure. If this cable is not attatched or loose, the headlights will flicker.

Dec 30, 2012 | 2003 GMC Yukon

1 Answer

Gave a jump start and now headlights don't work on a 2005 yukon denali


sound like battery has weak or battery terminals and post need cleaning. have battery charged and checked, if battery good. alternator not charging battery. if battery over 5 years old more likely battery is bad.if battery too weak head lights wont turn on battery dead this time of year if battery old. cold weather will finish it out.

Nov 28, 2012 | 2005 GMC Yukon Xl Denali

1 Answer

2007 Yukon XL, 1500 SLT, 4WD, headlights randomly go bright to dim and back very quickly


Yes this can be a normal condition caused by load being applied to the headlights and that lowers the voltage, the lites dim, then the load is removed and the lights brighten. Typical loads that cause this are AC climate control related. Have the Alternator load tested to confirm there is no problem in the charging system. Also have the battery tested, a battery that is starting to fail can cause this problem as well, a failing battery takes a huge amount of charging system power to keep it up, so that makes the lighting see higher spikes in voltage

Sep 18, 2012 | Cars & Trucks

1 Answer

1999 es 300 lexus headlights dim when windows roll down


You have a wire grounding somwhere, Look for any cut wires or frayed wires,

Sep 05, 2012 | 1999 Lexus ES 300

1 Answer

Why do my headlights brightning and dimming 2007 yukon?


Headlights dimming and brightening indicate a change in output voltage from alternator, not a problem as long as its within certain guidelines, usually 12.4volts - 13.6 volts (approx) . Overcharging alternators will produce a rotten egg odour from battery as it dries out. Put a voltage metre on the enging at idle and check upper range .

Aug 26, 2012 | 2007 GMC Yukon

1 Answer

1998 gmc yukon headlights not working


You may need to replace the auto headlight switch.

Dec 10, 2009 | 1998 GMC Yukon

1 Answer

My dim lights stop working, but if you tap on the headlights they turn back on. The brights are still working????


you mean tap on the outside of the headlight and they both (left and right) go on at he same time?? bulbs are the first thing to check

Oct 14, 2009 | 2004 GMC Yukon

1 Answer

I have a 2005 Yukon Denali and the daytime running lights won't come on at all both left & right. I have swapped relays, checked fuses, and looked at lights. Right side is ok. Left side would be harder...


Just replace the bulbs,they don't last that long.The trick is remove the headlights,there is (2) pins on top of headlights.
Remove the pins and pull the headlights out the way.The light sockets are right below!

Mar 31, 2009 | 2005 GMC Yukon Denali

Not finding what you are looking for?
2004 GMC Yukon Logo

534 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76070 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...