Our Acadia was towed home after displaying messages Service Stabilitrak, No Traction Control, and Service Traction Control. After using a scanner, the following codes are stored: P0011, P0014, P0021, and P0024. They all are related to the camshaft variable timing solenoids. Also HCAT, AIR, and EGR monitors are not working.

In this video, I tackle the common problem of a clogged PCV Valve (Positive Crankcase Ventilation).
A clogged PCV valve will make the engine to start vomiting oil to the snorkel before the throttle body. This can also clogged the MAF sensor (Mass Air Flow), the throttle body lever, the throttle body position sensor, which would give us the failed monitors for emissions.
Also, the same problem would cause a low oil pressure inside the engine and not enough oil to reach the camshaft solenoids...which would trigger the four codes I am getting.