Question about 2004 GMC Yukon

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2004 gmc denalli antifreeze leak

I HAVE ANTI FREEZE LEAKING FROMTHE BACK SIE OF THE MOTOR, DO YOU KNOW WHERE IT WOULD BE COMING FROM.My son says there is some coolant lines with Orings that go bad, have you heard of this?

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Water pump is the main leaking point on any engine as this is were a bearing is and is the weak point. other points is an old hose you can get pin holes in them over time and this is most common to the top hose to the radiator. O ring type they can fail on them but its usually down to not being replaced when the pipe has been taken off. when you remove these type pipes you need to put a new seal in them and they only cost pennies or cents depending were you are they are cheap.

Posted on Mar 24, 2014

  • April McKillop
    April McKillop Apr 20, 2014

    i have a 2003 denali and at 98000 miles my water pump just went out ... it was leaking just above the front diferental and i had a lot of blow back [dripping then when driving it blows back onto other parts] so i had to clean under there at the car wash, drive it a few miles and then see where it was actually dripping from, what color is it also ? if you have green, OR red yes it's the anti-freeze, [green normal, red long life, red is better in older cars] ... the fix cost me $500 including labor costs here in cali; the part it's self $250 ... hope this helps


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Posted on Jan 02, 2017

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SOURCE: gmc 1997 safari leaking antifreeze

most likely waterpump i have the same problem.

Posted on Jan 12, 2009

  • 1070 Answers

SOURCE: 1999 suburban usung a lot of antifreeze

Some of the V-8 engines like to leak out the back of the intake manifold. It then drips onto the exhaust and evaporates so you never see it, you just smell it. Look for it back there. You may want to have the system pressure checked too. If it is leaking out the intake, it is not an easy or cheap fix. I just did my 96 Yukon and it was not fun.
Good Luck and hope this helps.

Posted on Mar 29, 2009

  • 599 Answers

SOURCE: Antifreeze leaking from freeze plug

sorry not an easy fix, you must replace the freze out plug by taking out the old one and replace with a new one. needs to be done on a lift not a backyard job

Posted on Apr 08, 2009

  • 2 Answers

SOURCE: 2004 gmc denali leaking antifreeze


Posted on Jun 22, 2009

  • 3 Answers

SOURCE: coolant leaking at rear of

if it is coming around fly wheel cover it is a plug ther is 2 in back of the block trany covers them up .it also could be back of intake gaskets

Posted on Nov 27, 2010

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