My wife'* 2011 GMC Terrain SLT 2WD was throwing "Service Stabili Track" and "Engine Power Reduced" along with a hard idle and stalling/dying at low RPMs. Got a reading that came up with P0013, P0011, P0016, P228D. It would start until I cleaned the throttle body with a throttle cleaner. As of now I've replaced the Throttle Body, Both the Intake and Exhaust Actuators, Crank Shaft Position Sensor, Camshaft Position Sensor(A), Spark Plugs, has a fresh Oil change and Air Filter. Oil was clean. Fuel pressure is good. Plugs are getting fuel but not a consistent spark. Any other ideas would be greatly appreciated!!! THANK YOU.

What fuel pressure were you getting?

Isn't this direct injection? Doesn't it have a high pressure pump?

Does the vehicle start and run better if you spray carb cleaner into the throttle body?

Pressure is just above 60 when you turn the key on and it will not start even with starter fluid.

Did you clear codes? Did any come back?

Have you checked for spark?

Did you ever get this issue resolved??

Looks like dilly_bones never logged back in after their last post. I bet they'll never see this. I see you've added a post for the issues on your car. I'll go check out that thread next.