What 318 owners told NHTSA about the 2015 GMC Canyon

I own a 2015 GMC Canyon that developed repeated and serious fuel-system and engine problems beginning around 56,000 miles. The vehicle experienced fuel contamination (water in the fuel system), multiple fuel injectors failing and sticking open, repeated misfires across several cylinders, and engine stalling/shutdown while driving. The truck was towed multiple times and repaired repeatedly by an authorized GMC dealership. Repairs included injector replacements, fuel pipe replacement, fuel-system cleaning, and related work. Technician notes show that broader repairs were recommended but not fully authorized, and the same problems continued to return. Despite the dealership later stating the vehicle was repaired, there is no written safety certification, no documented fuel-system integrity testing, and no GM engineering clearance confirming the vehicle is safe to operate. Because of the repeated failures and risk of fire or loss of power, I do not feel the vehicle is safe to drive. I personally paid over $6,000 out of pocket for fuel contamination repairs and spark plug replacement (not including towing), after warranty coverage denied some repairs as “water damage.” The vehicle has been unsafe or inoperable for extended periods. I am reporting this because repeated fuel-system failures and engine shutdown present a serious safety risk and may affect other vehicles of the same model.

NHTSA ODI 11705723

Stabiltrak system stops working randomly all the time. It is seemingly random. It can do it as soon as I crank the truck, but more commonly it happens when I am driving. The ABS also will cause the truck to pull harder in one direction either left or right randomly. I have to put pressure on the steering will in the opposite direction to keep the vehicle in the middle of the lane. Stabiltrak sensor 1st went off around October 2023. It typically doesn't come back on immediately if I power cycle the truck. No accident to report yet but when the power steering does no work while I'm driving, it is extremely hard to turn.

NHTSA ODI 11661672

WHEN DRIVING THE CAR GET HARD TO STEERING SIDE TO SIDE AND A WAINING LIGHT FOR SERVICE COME ON. TRY TO GET SERVICE BUT WHEN THE CAR IS TURN OFF LIGHT COME OFF AND CAN'T BE DETECTED BY THE DIAGNOSTIC SYSTEM. THE FUEL SYSTEM I CHANGE 3 NEW FUEL CAP AND STILL SHOW TIDE YOU CAP OR THE ENGINE SIGN

NHTSA ODI 11339084

UNDER NORMAL DRIVING CONDITIONS, MY CP4 FUEL INJECTION SYSTEM BLEW UP. I HAD TO HAVE IT TOWED TO THE NEAREST DIESEL REPAIR SHOP, $14.000 LATER , I WAS BACK UP AND RUNNING

NHTSA ODI 11309254

MY 215 EXTENDED CAB, LONG BED GMC CANYON SLT HAS 13,000 MILES AND NO ACCIDENTS OR HARD DRIVING (ALMOST EXCLUSIVELY DRIVEN ON THE ROAD) WITH SOME SHORT HAULING OF LOADS LOCALLY (1500 LBS OR LESS). NO MAJOR WORK HAS BEEN DONE TO THE ENGINE OR TRANSMISSION. TODAY (9 OCT 17), I WAS TAKING A SHORT DRIVE TO HOME DEPOT FROM MY HOUSE (~6 MI), ALMOST IMMEDIATELY I BEGAN TO SMELL A STRONG ODOR OF GASOLINE (TRAVELLED HALF A BLOCK)...I HAD JUST DRIVEN THE TRUCK ON FRIDAY TO WORK AND SMELLED NO ODOR, SO I THOUGHT IT MUST BE A VEHICLE IN FRONT OF ME. BUT THE ODOR PERSISTED AND WAS WORST WAITING AT STOPLIGHTS. I SMELLED GAS AGAIN ON THE WAY BACK HOME AND NEW IT MUST BE MY TRUCK. AFTER I PARKED I POPPED THE HOOD WITH THE ENGINE RUNNING AND SMELLED NO GAS, UPON RETURNING TO THE CAB TO SHUT THE ENGINE OFF, I SMELLED STRONG GAS AGAIN, AND LOOKED DOWN UNDER MY TRUCK AND SAW GAS SLOWLY DRIPPING ON THE DRIVEWAY. I SHUT THE TRUCK OFF AND THE GAS CONTINUED TO STREAM SLOWLY DOWN THE SIDE OF THE TANK - IT APPEARS TO BE ORIGINATING FROM THE WHERE THE FUEL LINES CONNECT TO THE IN-TANK FUEL PUMP ON TOP OF THE FUEL TANK. I COULD REACH THE TOP OF THE FILLER TUBE WITH MY HAND AND IT WAS DRY, WHEN I REMOVED THE FUEL CAP, THERE WAS NO PRESSURE SO THE FUEL MUST BE COMING FROM THE FUEL FEED LINE OR THE RETURN LINE CONNECTIONS. AFTER A FEW MINUTES WITH THE ENGINE OFF THE LEAK STOPPED. THE TANK WAS NOT OVERFLOWING BECAUSE IT WAS ONLY HALF FULL. I PLAN TO HAVE THE VEHICLE TOWED TO THE DEALER IN ST LOUIS FOR REPAIRS. I THOUGHT THE LINES MIGHT HAVE BEEN CHEWED BY AN ANIMAL (SQUIRREL), BUT THE LINES ARE STEEL. I WILL FIND OUT MORE FROM THE DEALER ONCE IT IS REPAIRED.

NHTSA ODI 11032610

THE TRUCK FALLS ON IT'S FACE WHEN ACCELERATING AFTER SLOWING DOWN. THE DEALERSHIP SAYS NOTHING IS WRONG. THIS IS A DANGEROUS SITUATION. I HAVE TALKED WITH OTHER CANYON OWNERS AND THEY HAVE THE SAME PROBLEM.

NHTSA ODI 10991537