if you smell it inside, it's the heater core it has a leak.
smell of antifreeze and no visable leaks usually indicates that the heater core needs replacing
leaking heater core
Good chance you have a leak in the heater core.
your vehicle may smell like antifreeze while driving because it is overheating
if you can smell antifreeze you need to replace the heater core in the vehicle
A small amount of antifreeze smell may be emitted from the radiator overflow. However if you smell antifreeze you need to make sure there isn't a leak. It may be something simple if you catch it early.
If it is a vortec engine, it is probably the lower intake manifold gasket. In most cases you can smell it when the engine is hot.
Maple syrup.
An antifreeze leak.An antifreeze leak.
The smell of antifreeze is very strong and distinct, it does not take much of a leak to smell it. The radiator could still be full and have a small leak. I would check for antifreeze dripping onto the exhaust or on the engine block because when it is hot the smell is much more noticeable from the fumes.
The heater coil probably has a leak causing steam and vaporized antifreeze to be released into the vents. Is it using coolant?
You have a leaking heater core. You might smell antifreeze if you turn on the defroster.