One problem related to air bag on-off switch has been reported for the 2007 Chevrolet Silverado. The most recently reported issues are listed below.
Yesterday on 4/10/2014 at 2:00pm I get into my 2007 chevy Silverado 1500 classic crew cab and start my truck. I notice that once I let go of the get it never returned to the on position from run/start position. The truck is running and unable to turn off. I had to go under the hood fuse box to pull the pcm fuse to shut the truck off. This how ever still left the truck on. It is now sitting in the shop in phoenix, az aaa owned and operated shop on 75th Ave and thunderbird. I will be requesting the parts after seeing and hearing the "ignition switch recall" of other gm vehicles.