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Q:

changed thurmostat heat worked now not working heater core hoses 1 hot other not on 2007 Pontiac Grand Prix

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
what should i do i need heat car does not over heat
(1) Answer
heater core is clogged and needs to be flushed out. you need to run water through the core in both directions to get the dirt out. changing the thermostat and flushing the rad is a good idea as well.

Roy