The blower fan for heat In my vehicle was replaced in October 2022, recently the Defroster will not engage and it is vital to winter driving. The mechanism that switches between which vent to blow out air was replaced and the Defroster will still not engage, rather it comes out of the heat and face vents. Shortly after the Defroster stopped engaging, the rpms will start fluctuating from 2 suddenl…
2015 gmc Terrain powertrain problems
moderate 21 complaints filed with NHTSA · avg repair $2,500
Complaints
21
Recalls
0
Crashes
0
Avg fix
$2,500
What owners are reporting 4 most recent
THE ENGINE LIGHT CAME ON AFTER AN 3 DAYS AFTER OIL CHANGE AND BEGIN TO CUT OFF WHEN I WOULD ACCELERATE. I TOOK IT TO CARMAX AND THEY SAID IT WAS A FAULTY SENSOR WHICH WAS COVERED BY THE POWERTRAIN WARRANTY. CARMAX SUGGESTED I TAKE THE CAR TO A GMC DEALER FOR REPAIR. I TOOK THE CAR TO THE GMC DEALER, THEY REPAIRED IT AND 1 1/2 WEEKS LATER THE ENGINE LIGHT CAME ON AND THE CAR WAS CUTTING OFF AGAIN. …
VEHICLE RANDOMLY SAYS SERVICE STABILITRACK AND TRACTION CONTROL. SERVICE ENGINE LIGHT, TRACTION CONTROL LIGHT COME ON. RPM GUAGE, SPEEDOMETER, DIGITAL SPEEDOMETER, TEMP GAUGE ALL WILL BOUNCE AND GO TO 0. VEHICLE STRUGGLES TO ACCELERATE WHILE THIS IS HAPPENING. WHEN IT KICKS BACK IN VEHICLE JOLTS. I CANNOT REPLICATE IT, DOES THIS RANDOMLY. HAS BEEN TO THE DEALER MULTIPLE TIMES AND THEY CANNOT REPLI…
TL* THE CONTACT OWNS A 2015 GMC TERRAIN. THE CONTACT HEARD AN ABNORMAL NOISE COMING FROM THE VEHICLE. THE DEALER DIAGNOSED THAT THE WATER PUMP, TIMING BELT, GASKET KIT, AND CHAIN LINKS FOR THE TIMING BELT FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. AFTER BEING SERVICED, THE VEHICLE LATER BEGAN TO LUNGE FORWARD AND THE GEARS ATTEMPTED TO SHIFT. THE VEHICLE WAS TAKEN BACK TO THE DEAL…
Common questions
How serious is the powertrain problem on the 2015 gmc Terrain?
It's a documented issue but not catastrophic. 21 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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