no heat

1998 GMC SAFARI
6 CYL • 2WD • AUTOMATIC
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POSTMAFAMILYMECHANIC
  • MEMBER
  • 1 POST
What are possible reasons for no heat in cabin? I flushed and filled system and replaced thermostat. Possible oil in antifreeze and/or excess water out of tail pipe.
Nov 25, 2010 at 7:46 PM
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GMTECH
  • ✓Experienced Mechanic
  • 537 POSTS
Did you just flush the regular way. You might want to try back flushing the heater core. Take a hose and push water through the opposite way of regular flow. It might push all the crap out of the system.
Nov 25, 2010 at 7:53 PM
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