Now that we are retired and can take longer vacations, what precautions should be taken if the car sits idle for two weeks or longer in the garage?
Nothing , I had an extra vehicle that would set outside for weeks and start just fine. Now you could put your mind at ease by purchasing a rechargeable battery pack just in case the battery gets low.
If the “or more” stretches to months, I would add a gas stabilizer and hooking up a battery maintainer.
Additionally, the OP might want to consider placing a lot of baited mouse traps in the garage, so that he doesn’t come back to find that rodents have chewed the insulation from the car’s wiring.
funny , when younger i always dreamed of having 2 cars (winter/summer) and than i did! well for me it was a mini nighmare as i didnt drive one of the cars and was told after i started having problems exhust rusting fuel lines breaking and so on. the shop told me i must dirve the car or else it will contiinue to have issues! to make a long story a bit shorter… i filled the car up , put it on blocks and unhooked the battery ( i also used sea foam) but in your case of just a few weeks, it should be no issue…