Slow leaks.

they are probably aluminum wheels and cold weather makes them deflate. or there is a small leak. Take it to a tire store and have them put glue around edges of tires after breaking them away from rim.make sure they clean the rim as well.

Tried that, brought to the dealership and got the runaround twice. second time they said there were two nails in tires and charged us 40 bucks. took it to our mechanic who sanded the rims and sealed all for tires. 100 dollars later we still have two tires losing air.

it has to be a problem then with a either a valve stem or maybe a cracked rim. have them fill with air at a tire store not a dealer, submerge it in water to find the problem, it should show up.

Thanks. Did what you said, and it turned out to be be 2 valve stems....when I was a kid pumping gas and a customer came in with a slow leak, we removed the tire and put it in the tire tub, no questions asked. I had no idea you need to request that before it gets done....Thanks again. Jimmy.

well you shouldn't have to but todays' people probably don't know what a tub is lol