How do you check and change a camshaft position

See if your security light stays on when the key is turned to the ON position. If so, you need to have your VATS system checked.

Or crankshaft position sensor > The only way to find the problem , have it checked by a qualified repair shop that has the diagnostic tools to check , not guess !

if you have not changed the camshaft position sensor you need to do that sounds exactly like my problem got the new fuel pump and filter in there and it was fine for a month then same thing started happening again, been fine for 7 months since I changed my camshaft position sensor

when oil is cold it is thicker and stays [on]coats metal as oil warms up it thins out and flows better[makes it thinner will hear ticking] sounds like a bad lifter or even camshaft lobe problem ,could also have a problem with a loose or out of adjustment rocker arm

LITTLE WHITE SMOKE NORMAL WHEN VECHICLE FIRST STARTED IN THE MORNING,WHITE SMOKE WILL DISAPPEAR WHEN ENGINE GET OPERATING TEMPERATURE.CHECK FOR FUEL PRESSURE COULD HAVE STOPPED UP FUEL FILTER, BAD FUEL PUMP RELAY OR FUEL PUMP FAULTY BAD CONTAMINATED FUEL WILL CAUSE ENGINE TO STALL OUT.

Not sure why you are thinking camshaft position... I am thinking maybe a relay is giving up. Did you check for fuel pressure and spark after the stall?

Be sure to check the water pump. With the car running you can take a very long socket extension and place one end on different parts of the valve cover, block, alternator, a/c compressor, etc. and the other end hold to your ear. You may be able to pinpoint where the noise is coming from. This truly is a great way to narrow own a noise like this but....BE VERY CAREFUL NOT TO INTERFERE WITH ANY MOVING PARS OR HOT ELECTRICAL CONNECTIONS. THINK SAFELY AND IF YOU DON'T FEEL COMFORTABLE, TAKE IT TO A PROFESSIONAL. SAFETY FIRST.

Keep following the noise with your hands,when you find it,you will feel the clicking.Good luck,
ChevRev