2004 GMC Yukon antifreeze

Tiny
SILKYBO2
  • MEMBER
  • 2004 GMC YUKON
  • V8
  • 2WD
  • AUTOMATIC
  • 103,000 MILES
I have to put antifreeze coolant in the car too oftern why is this? Also when I start the car in the morning or after its been sitting white smoke comes out but just at that time. Also my oil gauge is high when I start out but goes down afterawhile, I have not leaks, no smells, runns good.
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Thursday, April 9th, 2009 AT 9:39 AM

4 Replies

Tiny
MHPAUTOS
  • EXPERT
Hi there,
thank you for the donation.

You may have a small coolant leak that is not visible, have a coolant system pressure test done as this will show up any small external leaks, also have a head check done, this will detect any exhaust gasses in the cooling system, this is a sure sign of head problems, with the engine oil it is normal for the pressure to drop when the engine heats up as the oil gets hot it looses some of its viscosity and the pressure will fall little at idle, if you keep your engine services up to date this will not be a concern for some time to come.

Mark (mhpautos)
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Thursday, April 9th, 2009 AT 9:48 AM
Tiny
LITTLETOOTPILOT
  • MEMBER
Hate to say it you have the same problem I had I spent almost 5k to get it fixed. GM has a service builtten out on the o4 yukon. The head on your yukon are basicly JUNK. The problem is the casting of the heads were bad and the antifreeze is going though the metal in the head. I know it sounds funny but its the truth I saw it with my own eyes. We had the heads redone in december and the dealer in michigan didnt bother telling us about the service bulliten. Then I got down to texas and not even 4 months later the antifrezze was mixing with the coolant. Witch is what is happing to you. My wife had the white smoke on start up problem. As well the head gaskets are what they said were bad the first time but. Now after having it fix with new heads things look pretty good so far. Hope this helps. You can expect to see more problems with gm vehic in the future too. As they keep shipping jobs to mexico. I use to work for a supplyer of gm and saw the stuff our plant in mexico was making and it sceard the hell out of me to see the scarap they were sending out. So I will say I will not buy gm any more gotten burned to many times I think I am going to be a ford man now.
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Wednesday, June 17th, 2009 AT 12:28 AM
Tiny
LITTLETOOTPILOT
  • MEMBER
Alos dont waste your money on having it pressure checked with out taking it to the dealer and telling them you know about the bulliten and you want to know if these are the heads on the bulliten witch sounds like they are there is a casting mark that identifes the head. Your best bet is just to replace the heads! Other wise you will be wasting money like I had too. Good luck let me know what happens. Hope this helps
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Wednesday, June 17th, 2009 AT 12:31 AM
Tiny
LITTLETOOTPILOT
  • MEMBER
Also check you oil if it looks like a light brown and is milky. Your heads are the problem. Thats how I cought it the last time. I was close to an oil change and it looked light brown not dark and I had to add 3/4 of a gallon. You can also pull off the oil filler neck by twisting it and looking in side of it for oil and antifrezze mixing by thick guuey stuff.
Hope this helps
just pissed at gm a little over crappy quailty again.
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Wednesday, June 17th, 2009 AT 12:39 AM

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