What I've done in years past to repair...not real repair but to stop more damage from leaks...take hair dryer to make all dried up and warm. Use marine white sealant on holes. Beside that you can only replace siding and that is a expensive job.
2015 338RETS Eagle Premier gloss sides., king.
2012 Ram 3500, crew cab 4x4 duelly Deleted
16k miles, 530HP, 1000 +torque.