Put air to it with an air compressor, if the truck goes up they are still installed, if you hear it leak out from under the frame then they are gone. I put a set inside the coil springs of mine and it looks like they go nowhere also lol
I plug mine in when temps below 30 at night. Got 162k on my 2014 and sometimes in the morning it won’t remote start. I run hot shot edt and truck seems to be happier on it
If egr was replaced before the recall, then you should follow up for replacement. If it has been replaced, most all mopar parts hve 2 year unlimited mile warranty, at least electrical stuff does.