Family has 4. 2 over 300K (including mine) 1 over 200K and 1 @ 150. 3 Hemis, 1 4.7.
Overall have been very reliable, and cheap to run.
Which engine you looking at.
4.7s have some cooling issues, dont let them get too hot when something breaks and its not that big a deal, water pumps and radiators mostly.
They all have condensor fan issues, not that big of a problem, with a little cutting you can get the new assembly in without opening the system, all of mine are still on the stock compressor and components, put a condensor fan in 2 of them 1 of which is on its third one.
Driver side seat bottom tears, foam wears out quickly. New foam still availble cant remember if cover is still available.
They sometimes have evap issues, not super common, none of mine have had any.
DBW ones seem to have TB issues every once in a while, although like most cars if you clean it periodically failures arent very common, failures arent super common anyways.
Auto trannies are pretty robust. 3 of mine have stock trannies, the 350K mile Hemi that tows a trailer and camper constantly just got a rebuild, mine with a 4.7 is still on its stock trans at 300K and just got it's first fluid change, it also tows a trailer pretty regularly.
4wd versions need ball joints pretty commonly and hubs, 2wds not as much.
I can give you a rundown of everything thats been replace on them.
03 4.7 2wd 300K miles.
Waterpump twice.
Thermostat.
Radiator twice.
Condensor fan.
PCV valve.
Plugs twice.
ball joints @295K.
Brakes twice on both axles.
Shocks.
air filter.
Ignition Switch.
Trans fluid and filter.
Needs an oil pan gasket (new leak within last 10K miles) and actuator (doesnt blow heat out driver side).
05 5.7 4wd.
Trans rebuild at like 340K, fluid was never changed.
Waterpump.
Thermostat.
Condensor fan - twice.
EGR solenoid.
Plugs - twice.
Fuel pump.
Brake - 2 or 3 times on front axle 2 on rear axle.
1 front axle.
All 4 ball joints - replaced twice.
Shocks.
1 rear wheel seal.
Hubs - 3 total hubs.
p/s pump.
4WD shift rod bushings.
07 5.7 4wd about 200k. Literally has only had oil, air filters, tires, wipers and brakes. No repairs that arent considered wear items.
04 2500 5.7 4WD. Brother just bought it for peanuts and it has a small evap leak code, havent bothered to track it down has like 160K on it.