2011 Silverado 2500hd setting lean code

[GASoline71]

I have a 2006 K2500 with a 6.0L and it started to act up like that recently but it set no code. Then one day shortly after on the highway it lost power and was running rough as all get out. I moved over to the shoulder and it died before i rolled to a stop. I sat there for about 15 minutes trying to figure out what just happened. Then tried to start it and it fired right up, but with a check engine light on. I limped it to an Autozone (would run for a bit, then run rough and die), where they put a scan-tool on it. P0336 Crank Position Sensor.

Replaced it with a new one the next day and runs like a top again.

Gary