Question about 1999 Saturn SL
The most likely problem is a stuck heater switch. follow the heater hoses from the firewall to the engine block, somewhere along those lines will be a switch that allows the warm coolant to pass through the heater core. place your hand on both sides of the switch with the car warmed up, if the side towards the block is warm and the side towards the heater core cool then replace the switch.
Posted on Nov 23, 2008
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Posted on Jan 02, 2017
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