NHTSA Complaint #11114243 — 2010 CADILLAC SRX

BOUGHT VEHICLE USED FROM SOUTHFIELD QUALITY CARS DETROIT IN OCT 2017 AT 96673 MILES. AT 100,000 MILES CHECK ENGINE LIGHT HAS COME ON AND A CODE SCANNER OBD2 USED HAS REPORTED A P0017 CODE THAT TRANSLATES TO ONE OF THREE THINGS. 1. OIL DRAIN TUBE INTERIOR ENGINE BLOCKED 2. SENSORS 3 TIMING CHAIN. HAVE DONE ENGINE FLUSH, RESET CODE, CODE CAME BACK ON NEXT DAY SAME CODE P0017. WHY IS THERE NO GM RECALL ON THIS VEHICLE? TOOK TO A REPAIR SHOP, THEY REPLACED SENSORS, CODE CAME BACK ON IN A WEEK. PRESENT MILEAGE 106353. GM DEALERS WANT $2900 TO FIX. MY WARRANTY ISSUED BY DEALER IS A GWC WARRANTY. THEY WILL NOT FIX/TAKE ENGINE APART TO LOOK AT TIMING CHAIN UNLESS SOMETHING BREAKS. IF TIMING CHAIN BREAKS THERE GOES MY MOTOR. THIS IS SUPPOSED TO BE A GM FLAGSHIP VEHICLE? HELP!