2008 Chevrolet Silverado 2500 6.0L no start stall

Truck problem:

This is our fleet truck which is a 2008 Chevrolet Silverado 2500 6.0L having an occasional no start stall problem. It would start if you wait about 2-3 minutes. Scan the codes and we got:

p0011 intake A camshaft position timing bank 1
p0016 crankshaft position and camshaft position correlation bank 1

I just started working here and the maintenance done by previous mechanic who was just overwhelmed by the number of trucks to be serviced. I have read that keeping clean engine oil on these engines are important because it affects the cam phaser mechanical system. Is this my problem right now?

ATS Adviser:

When you see the P0011 code, it means that the ECM intended camshaft position angle and the actual camshaft position angle is bigger than 8 degrees for 20 seconds. Also the ECM will command the CMP sensor to park the sensor. The park position I is stuck at 0, which is what you are see on your scanner. It is getting stuck because the engine has a lack of maintenance or poor lubrication in your phaser components. The P0016 code does the same thing if the oil is dirty and will get stuck too. Once you see these codes and you see oil sludge in the engine oil, replace the phase components assembly including the actuator valve.

FINAL FIX:

The replacement information of these components were available from GM when we bought the parts and it was a breeze to replace. You saved my day. Thanks a lot!

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