There are 7 owner-reported fuel system complaints for the 2014 GMC Terrainin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
I'm having issues with my GMC Terrain when I start it. It always starts but it's like it keeps trying to start or is having issues getting enough fuel to get it to idle normal. Sometimes it only lasts a second or two and other times I have to push the gas pedal to get it to idle normally.
EARLIER THIS MONTH WHILE DRIVING, OUR GMC TERRAIN BEGAN SHUDDERING WHILE IN LINE AT A DRIVE-THROUGH. A FEW DAYS LATER WHILE DRIVING, IT DIED AT A STOPLIGHT, AND WHEN RESTARTED, IMMEDIATELY DISPLAYED A WARNING THAT THERE WAS REDUCED POWER DUE TO AN OIL ISSUE. WE WERE NOT DUE FOR AN OIL CHANGE. WE HAD THE VEHICLE TOWED TO A BODY SHOP WHO INFORMED US THAT IT WAS LEAKING OIL DRASTICALLY AND HAD A LEAK IN THE REAR MAIN SEAL. WE WERE TOLD IT WAS DUE TO THE COLD WEATHER AND THAT WE WERE THE THIRD GMC TERRAIN HE HAD SEEN IN 24 HOURS WITH THE SAME ISSUE. WE HAD TO TAKE IT TO A LARGER SHOP FOR THE REPAIR WORK, WHICH TOTALLED $2,407.33 TO REPAIR. THE SHOP SAID THE PCV SYSTEM FROZE AND CAUSED THE REAR MAIN SEAL TO BLOW OUT. THEY ALSO TOLD US THERE WERE MULTIPLE OTHER GMC TERRAINS WITH THE SAME ISSUE. I LATER LEARNED THAT GMC HAD TO ISSUE A SPECIAL COVERAGE ADJUSTMENT FOR THE EXACT SAME ISSUE FOR TERRAINS FROM 2010-2013. THIS WAS THE EXACT SAME ISSUE. THE SPECIAL COVERAGE NOTES THAT "GMC TERRAIN VEHICLE MAY EXPERIENCE A FROZEN PCV SYSTEM DURING COLD WEATHER OPERATION. THIS MAY INCREASE CRANKCASE PRESSURE LEADING TO A REAR SEAL OIL LEAK." THE PART NUMBER THEY REQUIRED TO BE REPLACED WAS THE SAME PART NUMBER WE HAD REPLACED.
OIL IS RELEASING OR LEAKING SOMEWHERE IS BACK FLASHING WHILE DRIVING AND BATTERY CHARGING SYSTEM SHUT DOWN. UNDERBELLY IS SATURATED WITH OIL. I WAS DRIVING ON MARYLAND INTERSTATE HIGHWAY 95 FROM HARFORD COUNTY TO BALTIMORE CITY, MARYLAND WHEN I LEFT THE INTERSTATE ONTO THE 6300 BLOCK OF EASTERN AVENUE WHERE I HAD TO PULL OVER AS THE VEHICLE SHUT DOWN. I HAD TO HAVE THE VEHICLE TOWED TO DAYS AUTO BODY AT BALTIMORE STREET AND CENTRAL AVENUE IN BALTIMORE CITY, MARYLAND FOR DIAGNOSTIC TESTS AND REPAIRS. VEHICLE WAS PLACED ON FRIDAY, OCTOBER 23, 2020
CHECK ENGINE LIGHT CODE FOR DEF HEATER FAILURE. POSSIBLE LIMP MODE EFFECT IN TRAFFIC.
THE FUEL PUMP NOZZLE DOESN'T STAY CONNECTED TO THE VEHICLE DURING REFUELING. FUEL SPILLS ON THE GROUND OR ON YOUR PERSON AND RISK OF SPARK WHEN THE PUMP NOZZLE HITS THE GROUND IN A PUDDLE OF GAS.
"TAKATA RECALL" WHEN REFUELING THE VEHICLE THE PUMP GAS NOZZLE WILL NOT STAY IN THE GAS FILLER HOLE. IT FALLS OUT EVERY TIME EITHER SPILLING GAS ON THE GROUND OR ON ME IF I STAND NEXT TO IT. I AM FORCED TO HOLD THE NOZZLE IN THE FILLER HOLE AT ALL TIMES TO AVOID THIS ISSUE.
FROM THE FIRST DAY I GOT MY GMC ALL I GET IS 10 MPG AND IT FEELS LIKE THE DEALER IS GIVING ME THE RUN A ROUMD.(GETTING NO HELP).
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026