If the deck's substructure is made from pressure treated lumber, remove the decking and you can reface using pressure treated planking or composite and at the same time make sure the deck connection to the house is flashed properly and water cannot penetrate the dwelling.

With that said, if exterior wood siding starting to show signs of deterioration, most likely there is already a problem behind it.

Good luck

I agree the GN. Also double check that the connection of the ledger board ( what the frame is sitting as it is attached to the house) is bolted on or screwed on using Ledger Lok ( brand name of a Fasten Master product) or some other code compliant fastener. I've seen too many decks fail because somebody just pounded in a bunch of nails. Make sure the bolts are not just going into the house sheathing, but into framing.

If you're doing this yourself, check out fFine Homebuilding. There are tons of articles on this. Get the flashing correct, you'll be glad you did.