1988 GMC Suburban overheating

1988 GMC SUBURBAN
200,000 MILES • V8 • 4WD • AUTOMATIC
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IMTANGLED
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  • 1 POST
my temp gauge goes all the way up, after minute it goes back down to mid way, radiator is half empty daily, chugs a little at higher rpms, blows white smoke at idle once that i have noticed and i have changed thermostat and gasket
May 28, 2010 at 4:41 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Could be the headgasket, cracked head or block and an intake leak-Get it block and pressure tested.
May 28, 2010 at 7:45 PM
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