2007 Cadillac Escalade Esv

Engine Mechanical problem
2007 Cadillac Escalade Esv V8 All Wheel Drive Automatic 68000 miles

I tried to remove the camshaft positioning sensor, and for nsome reason it is damaged or swollen and could not remove. In the process I broke off all but 3/4 of an inch and it fell inside. What do I have to do to get it out, and what kind of damage could happen if I start it? Is there any moving parts behind the sensor hole?Thanks
May 1, 2010.

If this sensor is located in the front timing cover, there is moving parts. The cam and crank sprockets and timing chain. Can you see the broken piece, or is it out of sight. Chances are it dropped all the way to the pan, but you don't know. Getting it out would probably require removal of the front engine cover. It is hard to say what could happen if you start it, worst case is it could damage the timing chain components, or cam sprocket reluctor.

May 25, 2010.