Strange smell

[Jeff1759]

Might be a weird question, but lately (just turned 50,000 miles) I have noticed a smell like lawn fertilizer after I have shut of the truck and am near the front of it.
It’s happened almost regularly. The first time, I thought my neighbors had their lawn treated but after I few times, I made the connection.
I tend to think it has something to do with the coolant, but that’s just a guess. I have no idea what it is!!???
Any help?

 

[Firebird]

Could be coolant, it's not uncommon to smell it a bit on a hot day

 

[silver billet]

We smell coolant with the 5.7s in the 1500s occasionally as well. Probably nothing to worry about.

 

[ductape]

Check for gunk buildup in the windshield air intake cowl

 

[dieselscout80]

Check for gunk buildup in the windshield air intake cowl

Is it possible to remove the cover/grid underneath the wipers to clean there? Also, if it can be removed how hard is it to remove and reinstall?