I recently had the PCV system cleaned on my 2009, 6 cyl. FWD Traverse LTZ. Unfortunately, the car is beginning to show the same symptoms even though I just had the system cleaned (< 1000 miles since I had it done). When the engine gets hot, it will shudder briefly (3 or 4 seconds) and then resume speed. This does not happen all of the time. Maybe once or twice on a 45 minute commute. The car has approximately 107,000 miles. The required maintenance (ie. oil changes, etc.) has been performed by the local dealership. Any suggestions on what could be causing this?
Thanks