Question about 1999 Oldsmobile Bravada
I had the same problem and found out the red coolant that gm was using was clogging up the heater core.
You need to have it flushed and new coolant put in other than the red coolant
Posted on Nov 08, 2009
Check your thermostat. Could be stuck open. Or, if you bought it used, it may even be missing. Also, try flushing out your heater core with a garden hose. Put the hose on one pipe until the water comes out clear. Put it on the other and do the same. Do this 2-3 times.
Posted on Oct 06, 2009
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Posted on Jan 02, 2017
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