TL*THE CONTACT OWNS A 2005 CADILLAC SRX. WHILE DRIVING 20 MPH, THE VEHICLE BEGAN TO HESITATE WITH A STOP AND GO MOTION. THE CHECK ENGINE INDICATOR ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT DID NOT NOTICE ANY WARNINGS PRIOR TO THE FAILURES. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION AND THEY STATED THAT THE TIMING CHAIN, TWO VALVES, AND A CAM ACTUATOR FAILED. THE VEHICLE WAS REPAIRED, BUT THE FAILURES CONTINUED. THE VEHICLE IS CURRENTLY AT THE DEALER BEING INSPECTED BY A CADILLAC ENGINEER. MULTIPLE PARTS HAVE BEEN REPLACED, BUT THE FAILURES ARE STILL OCCURRING. THE CONTACT CALLED THE MANUFACTURER AND WAS ADVISED TO TAKE THE VEHICLE TO THE DEALER FOR INSPECTION. THE FAILURE AND CURRENT MILEAGES WERE 56,000.