THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT THE TURBOCHARGERS FOR THE ATS-V LF4 ENGINE ARE ON PART RESTRICTION THROUGH GENERAL MOTORS TECHNICAL ASSISTANCE CENTER. DEALER WILL NEED TO CALL GENERAL MOTORS TECHNICAL ASSISTANCE CENTER FOR FURTHER ASSISTANCE. PRIOR TO CALLING GENERAL MOTORS TECHNICAL ASSISTANCE CENTER PLEASE REFERENCE THE LATEST VERSION OF PI1234.