2016 GMC Canyon Fuel System Problems

It keeps putting my vehicle into limp mode with the def system and tell me that I have poor exhaust quality. I can’t keep taking my vehicle into the shop not sure if it’s a sensor or the soot again or what but something has got to give

AN ANIMAL CHEWED THROUGH THE FUEL LINE CAUSING A SIGNIFICANT FUEL LEAK. THIS WAS CAUSED BY THE CONSTRUCTION ON THE FUEL LINE CONTAINING SOY BASED PRODUCTS WHICH ATTRACTS WILDLIFE. THIS OCCURRED WHILE THE VEHICLE WAS PARKED (STATIONARY).

ON JULY 2ND, I LOOKED WHERE MY CANYON WAS PARKED AND FOUND A SIGNIFICANT AMOUNT OF DIESEL FUEL ON THE GROUND. UPON FURTHER INSPECTION, I FOUND FUEL ALL OVER THE UNDERSIDE OF THE VEHICLE AND A SEVER LEAK FROM A HOSE. THE HOSE WAS RUBBING ON A CAN COMING FROM THE AC COMPRESSOR. THE VEHICLE DOES NOT LEAK WHEN PARKED (OTHER THAN DRIPPING) BUT LOOSES SIGNIFICANT FUEL WHEN IDLING OR DRIVING. THIS ISSUE LIKELY STARTED A FEW DAYS AGO BUT WAS NOT DISCOVERED UNTIL 7/2. THE FUEL ITSELF IS CLOSE TO SEVERAL HOT COMPONENTS INCLUDING THE TRANSMISSION, EXHAUST AND TRANSFER CASE.

TL* THE CONTACT OWNS A 2016 GMC CANYON. THE CONTACT STATED THAT THE FUEL TANK WAS MISSING THE METAL SKID PLATE AND FUEL LEAKED FROM THE VEHICLE. WHEN THE CONTACT APPROACHED THE VEHICLE, HE NOTICED THE FIRE DEPARTMENT WAS PRESENT TO INSPECT THE VEHICLE. THE CONTACT ALSO NOTICED A STRONG FUEL ODOR COMING FROM THE VEHICLE. THE VEHICLE WAS TOWED TO A REPAIR SHOP. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 18,446.

TRUCK SEEMS TO BE MISSING WHEN CRUISING, THEN HESITATION WHEN ACCELERATING. SEEMS TO BE NOT GETTING ENOUGH FUEL FREQUENTLY WHEN JUST ACCELERATING. DEALER SAYS THEY CAN'T FIND ANYTHING WRONG. TOLD THEM THE PROBLEM IS 90% REDUCED WHEN USING PREMIUM FUEL. STILL NO IDEA.