Everytime i crank my truck up i smell antifreeze. we have did a pressure test and nothing is leaking that we can see and it stays parked on a cement driveway and there are NO puddles of anything it stays dry! And it drives good no issues at all on SUPER hot days while running the air the thermostat gage will run up a little past half of getting hotter than normal but nothing higher ... No water in the oil. Just the smell of antifreeze. And yes this just started have never been able to smell it before.

 

Look under the carpet in the passengers footwell. The heater core might be leaking.