2004 Gmc Sierra Recently Noticed That Been Losing Antifreeze Visible Dips

2004 GMC SIERRA
100,000 MILES
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EMMYJEAN
  • MEMBER
  • 1 POST
I have recently noticed that I have been losing antifreeze but no visible dips or puddles on garage floor also noticed truck gives off a puff of whats looks like burning oil when I first start it then it goes away. Just bought the truck warranty is gone and not to happy. But truck runs fine. What could this be?
Oct 20, 2012 at 3:24 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
smoke could be valve seals.

cooling system has a leak. get a pressure test to find the leak.

Roy
Oct 20, 2012 at 4:38 PM
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