2011 CHEVROLET SUBURBAN Fuelpropulsion System Problems

ENGINE LIGHT ON-DIAGNOSIS P0455. LAST 2YRS TOOK TO MANY REPAIR SHOPS. REPLACED, GAS CAP, PURGE VALVE, CANISTER VALVE, CHARCOAL CANISTER. TOOK TO CHEVY. THEY REPLACED PURGE VALVE BECAUSE THEY SAID OTHER MECHANICS USED NON CHEVY PARTS. ENGINE LIGHT CAME BACK ON. CHEVY DID SMOKE TEST AND SWORE IT WAS THE FUEL SENSOR COST $1200+. ENGINE LIGHT BACK ON AFTER A WEEK. ANOTHER SMOKE TEST AND NOW PRESSURE TEST BLEW A SMALL SECTION OF FUEL TANK WHERE IT NOW LEAKS. CHEVY SAID THE SEAL MOST LIKELY NOT SEATED PROPERLY AND I NEED A NEW FUEL TANK ABOUT $1000. BUT THEY CAN'T GUARANTEE THIS IS THE CAUSE OF THE ENGINE LIGHT. I CAN'T AFFORD ANOTHER $1000 ESPECIALLY IF THIS DOESNT SOLVE THE PROBLEM. ALREADY SPENT THOUSANDS FIXING DIFFERENT PARTS. VEHICLE GETS ABOUT 12MPG AND HAS IN THE PAST LOST POWER WHILE DRIVING AS IF NOT ENOUGH FUEL IS GETTING THROUGH BUT THAT...

FUEL LEVEL SENSOR FAILED CAUSING FUEL TRANSFER PUMP TO OVERFILL FRONT FUEL TANK. CAUSING FRONT FUEL TANK TO EXPAND AND DEVELOP A FUEL LEAK.

ENGINE IDLING LOW, HESITANT AT LOW SPEEDS. CHANGED GAS, NO CHANGE IN HOW THE TRUCK WAS RUNNING. ENGINE LIGHT CAME ON, TOOK TO DEALERSHIP. REPLACED SPARK PLUG THAT WAS MISFIRING DUE TO OIL CONTAMINATION. CLEANED FUEL INJECTORS AND THROTTLE BODY, REPLACED VALVE COVER TO PREVENT THIS FROM OCCURRING A THIRD TIME (HAS HAPPENED TWICE ALREADY AND IN THE LAST NINE MONTHS). TOTAL REPAIR $1173. NOT COVERED BY WARRANTY.

THE ACCELERATOR HESITATES WHEN PRESSED. THE CAR DOES NOT MOVE AND WILL THEN ACCELERATE RAPIDLY WHEN AT A STOP AND TRYING TO ACCELERATE THROUGH INTERSECTIONS. DEALER COULD NOT DUPLICATE FOR REPAIRS. RECURRING ISSUE. ALSO HAS A POPPING OR CLUNKING NOISE IN BACK PASSENGER SIDE. DEALER HAS DUPLICATED BUT NOT REPAIRED. *TR