RAMs pickup truck is their best selling and most profitable vehicle by a wide margin. It sells more than most others combined.
Just to clarify, you mean FCA sells more Ram pickups then all other FCA vehicles combined, right? The F150 has been the top selling vehicle in the US for about 15 years. For most of those 15 years it as been F150 followed by the Silverado, the Accord and the Camry, with the last three swapping places on the list from year to year.
The real accomplishment for FCA and the RAM brand though is that in 2014 the Ram outsold the Accord, pushing it down to 5th place. The F150 was first, followed by the Silverado, the Camry the Ram, then the Accord.
I've got a 2009 Ram pickup that I bought new. Short bed, regular cab, 4x4 with vinyl seats, crank windows and rubber floors. It has been absolutely stellar since I have owned it, and is incredibly composed on the road since it has coil springs all around. The coils mean the tow rating is lower than a comparable leaf spring equipped vehicle, but the tow rating is still far more than I need.
I'm lusting after a Promaster though since for my needs having all my stuff enclosed in the van would be better, and then there is the small detail that no matter how I drive my Ram... slow, fast, city, highway, the mpg's are between 13.5 and 15. Towing drops to 10. Going from an average of 14mpg in my Ram to 24+ in a diesel Promaster I'll still be ahead of the game even though Diesel costs more. And yes, I know the gas PM would be an even bigger savings, but I prefer the performance characteristics of the diesel.. low rpm highway driving, maintaining overdrive on the highway even in a head wind and up hills, not hunting for a gear all the time, etc.