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I believe it is in the intake for the upper coolant line on the engine. not sure myself. hope it's right.
is there heat to blow or does the blower not work chk thermostat or vacuumn at htr sw respectfully
electric problem oldsmovible bravada
No
yes
pooop
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its a w
Could be, Low on coolant, A stuck open thermostat, A plugged heater core, A faulty temp blend door actuator,
In the distributor .
It is in the fuel tank.
see link below