My Equinox has one under it too, and I needed it when it was cold, dark, and wet (and snowy). I called tripple A and in my area they couldn't get anyone over to me for 2 hours. I am in NY, DH was in California. I immediately picked up the phone again and called work, and within minutes two co-workers were there changing my tire. I don't claim to be a needy helpless woman, but when is below zero, I am.
Maria