If you've ever wondered what the circle arrow button on your key fob is for but were too embarrassed to ask your mechanic or ...

While this is a great usability upgrade, for some reason key fobs continue to be bulky plastic monstrosities that when stuffed into a pocket can easily ruin the lines of a well-chosen outfit.

The biggest stories of the day delivered to your inbox.

In some cases, you just slide a panel on the back of the fob. The latest key fobs for the Silverado are even built so that the key can be used as a screw driver. Older ones are less convenient ...