Question about 2003 GMC Yukon Denali

1 Answer

04 GMC Denali Overheating

I have an 04 GMC Denali XL, that is overheating. Once i turn on my car and start driving it (also if it is idling) for a few minutes the"engine coolant hot" signal with start going off and if i turn the heater on full blast (fyi: heater blows air, occassionally warm air comes through) it will bring down the temp gauge for a few minutes then climb back up and the signal will start going off again. After the signal going off for a few minutes the overheating signal then goes off, so i pull over and let it cool off. just the other day i notice a huge puddle of what looks to be like oil or maybe power stering fluid, this is about a week after all this started (which has been going on for about 1.5wks), there isnt any other leaks, also 2wks ago i got an oil change.Thanks

Posted by on

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
  • 33 Answers

Check fluid level if full remove rad cap when car is cold and run while looking at fluid in rad if it is circulating you should see it moving if it does'nt move after car warms up thermostat needs to be replaced also check to see if fan is working properly and check the reputation of your mechanic some are not always honest

Posted on Dec 09, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Overheating air locked


Hello dad_mom863 and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your GMC Yukon Xl Denali, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose your overheating 2006 GMC Yukon Xl Denali
You will want to pay close attention to filling the system, and the block test section of the instructions.

Get more great (money saving) tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

Nov 24, 2010 | 2006 GMC Yukon Xl Denali

1 Answer

06 Yukon XL overheated. The coolent is pumped back into overflow tank and out.


Hello annaraez and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your Denali, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose your overheating Yukon

Get more great (money saving) tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

Aug 14, 2010 | 2006 GMC Yukon Xl Denali

3 Answers

My 2006 GMC Yukon XL Denali 6.0L is over heating and the interior heat does not work. Is this the water pump or is there a thermostat sticking? I'm in the mountains and thought maybe something was frozen...


overheating can be caused by stuck shut t-stat but u would have heat at-stat stuck open no overheating and no heat. a waterpump that the impeller broke or rotted of can cause your problem but rarly seen does your fan work or any leakage or low coolant can cause air pocket and overheating no heat. let me know and we go foward

Feb 10, 2010 | 2006 GMC Yukon Xl Denali

1 Answer

HOW DO I RESET THE CHANGE OIL LIGHT ONCE THE OIL


look in the manual......turn the ignition to the on position not starting it of course and then pump the gas petal 5 times then the light will blink a few times turn off then back on...problem solved

Jan 30, 2010 | 2002 GMC Yukon Denali

1 Answer

04 gmc yukon heater air cold passanger side.


If this happens when you are idle, and then you get hot air as you drive, most likely you have low coolant and it only cycles as you drive. Get approved dextrom gmc coolat and cap off your coolant it is most likely low.

Jan 17, 2010 | 2003 GMC Yukon XL

1 Answer

Overheating fan spinning but not fully functioning


Hello woadie4_00 and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 2002 Yukon, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose your overheating 2002 GMC Yukon Denali
Pay close attention to the fan, if it roars, then the fan and water pump should be replaced.

Get more great (money saving) tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

Oct 23, 2009 | 2002 GMC Yukon Denali

1 Answer

2005 yukon denali is overheating


Start it cold with rad cap off, and heater on high heat, and let it run until you see increased flow in radiator, indicating thermostat opened & engine reached operating temperature. Rev engine slightly every once in a while and hold it there for 10-20 seconds, just to help purge air better/faster. Watch rad flow again, and wait until you see increased flow 3 or 4 times. Then top up coolant in rad to an inch or 2 from top of rad, and put cap back on. Top up return bottle to appropriate level on bottle & then try it again. If it still heats up, get back to me. Does it overheat at all times? Rad fan is good i take it?

Jul 18, 2009 | 2002 GMC Yukon Denali

1 Answer

Overheating when outside temp goes above 90 degrees F


on GM vehicles they still use clutch fans and when sitting at an idle for a while the fan is not pulling enough air through the radiator and condensor so therefor the a/c starts to put out warmer air and the coolant temp. will rise a little bit. You could try replaceing the fan clucth and see if that helps any.

Jun 09, 2008 | 2002 GMC Yukon XL

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

705 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

60792 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

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

Answer questions

Manuals & User Guides

Loading...