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What could be the problem in a 1989 Chevy S10 4.3 that has no heat?
Wiki User
∙ 14y ago
Assuming the coolant level is full, it could be a stuck open thermostat or a plugged up heater core. With the vehicle warmed up, heater on and engine running, feel the heater hoses with your hands. If they are both luke warm you probably need to replace the thermostat. If one is hot and the other is luke warm you probably need to flush the heater core. If they are both hot you may have a problem with the temp blend door.
Wiki User
∙ 14y ago
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