When i am driving down the road and it's cold outside you can feel cold air coming into the cab by the passengers feet somewhere. The heater still works great and blows hot air but that cold will really chill the passengers legs. Thank You

 

Check the door seals especially around the bottom of the passenger side door. Also check the heater core coolant lines that run through the fire wall on the passenger side or any other passage that runs through the fire wall. Lastly check the underside of the floor for rusted spots under the passenger floor. Good Luck!!

 

Thanks for the suggestion. When you say check the heater core coolant lines through the firewall do you mean see if they have extra room around the hole? or is there something that could be wrong with the lines themselves? I did a complete wash including the underside recently and there was no rust at all under the floor. Thanks again and I will check them out to see if I see anything