Tonight my key would not turn I the ignition.
I pulled fuse 18 and reinstalled and this reset the immobilization system and the key would turn and the truck will start and run (drove 75 miles after this and pulled the fuse a second time to start it again.)
Everything else seems to work. The key locks and unlocks the doors, the cruise works, etc.
When the truck is turned off the steering wheel will not lock.
The battery reads 14.0v when the truck is running and 12.55v when the truck is turned off.
I'm thinking battery (one year old interstate), but am interested in other's thoughts.
Any suggestions are welcomed.