The 2021 GMC Terrain has good reliability. There are 2 recalls and 28 owner complaints on file for the 2021 GMC Terrain. Severity signals include 4 crash-related complaints. The most commonly reported problem areas are: Power Train (6), Electrical System (5), Unknown Or Other (3).
Terrain reliability snapshot
74/100
Latest model-year reliability score
3.5/5
RepairPal rating (medium)
$558
Avg annual repair cost vs $521 category avg
#22/26
Ranking in compact SUVs · better than 15% of peers
Data sourced from Auto Reliability Index, aggregating NHTSA recalls, owner complaints, and RepairPal repair-cost records.
Used-car research
Research the GMC Terrain before checking the VIN
Compare model years, recurring problems, safety campaigns and market value first. Then use the VIN to verify the history of the individual car.
Owner-reported problem categories from NHTSA complaint filings. Counts reflect complaints per category for the most-recent model year on file.
Power Train6
Electrical System5
Unknown Or Other3
Service Brakes3
Engine2
Suspension2
Pre-purchase inspection checklist for the 2021 GMC Terrain
Hands-on checks distilled from real NHTSA complaint patterns and recall histories. Bring this list to a test drive or mechanic inspection.
☐Check for transmission shudder during acceleration between 35-60 mph
☐Inspect for water leaks in spare tire compartment and passenger floors
☐Test brakes for responsiveness, especially on inclines
☐Verify infotainment system stability and screen functionality
☐Ensure fuel pump and control module operate correctly
☐Inspect for any signs of axle or suspension issues
What owners reported
2021 GMC Terrain owner complaints in detail
Owners have reported 4 crashes and 4 injuries to NHTSA for the 2021 GMC Terrain. These are unverified owner reports, not confirmed defect rates.
Owner complaints6
POWER TRAIN
Owners of the 2021 GMC Terrain frequently report power train issues, particularly involving the transmission. Common symptoms include the vehicle erroneously shifting to neutral while driving, causing deceleration, and significant shaking or vibration during acceleration, especially between 35-60 mph. Some vehicles also experience a failure to respond to the accelerator pedal, and in one case, the vehicle reversed instead of moving forward when shifted into drive. These issues are reported at mileages as low as 6,000 miles and up to 78,843 miles. While there are no reports of crashes or fires, the described symptoms could potentially lead to loss of vehicle control. Multiple owners note that GM is aware of these problems but has not provided a solution.
Owner complaints5
ELECTRICAL SYSTEM
Owners of the 2021 GMC Terrain frequently report issues related to the vehicle's electrical system, with multiple complaints describing unexpected and abrupt stops while driving. Symptoms include the vehicle coming to a halt with the parking brake engaging and all dashboard lights illuminating, despite the fuel tank not being low. These incidents often occur at lower speeds, such as in 30 mph zones, but owners express concern about potential risks at higher speeds. Additional complaints mention the radio and information screens going black intermittently and the vehicle operating without a key fob present, which could lead to being stranded if the car is turned off. These issues are reported in vehicles with mileages ranging from 13,000 to 23,900, with some owners experiencing problems shortly after purchase. Safety implications include potential loss of control and the risk of accidents if the vehicle stops unexpectedly.
Owner complaints3
UNKNOWN OR OTHER
Owners of the 2021 GMC Terrain frequently report water leaks leading to mold and mildew odors, particularly affecting the spare tire compartment and passenger floors, despite attempts to clear drain lines. Another common issue involves vibrations during acceleration, attributed to drive shaft problems, with some owners referencing a related recall. Additionally, a persistent rattle in the B-pillar or roof area is noted, with multiple repair attempts involving adhesive applications, although more invasive fixes are mentioned online. These complaints do not specify mileage ranges or timelines, and no direct safety implications like crashes or loss of control are reported. Potential buyers should be aware of these recurring issues, which may involve costly repairs and affect vehicle integrity.
Owner complaints3
SERVICE BRAKES
Owners of the 2021 GMC Terrain report issues with the service brakes, including sudden acceleration after brake release and brake failure on steep inclines. In two cases, these issues resulted in crashes, with one owner describing a non-responsive brake pedal while descending a hilly road and another reporting aggressive acceleration leading to a collision. One complaint mentions a recurring noise from the right rear brake when the vehicle is first moved after being idle, persisting since purchase in July 2021. Mileage is not consistently reported, but one incident occurred shortly after vehicle acquisition. Safety implications are significant, with two crashes and one injury reported, highlighting potential risks for used car buyers.
Owners report that the 2021 GMC Terrain experiences issues with the engine entering a "reduced engine power" mode, often accompanied by a check engine light. Complaints frequently mention that the vehicle struggles to accelerate, with RPMs rising unusually high, and describe occurrences of the vehicle entering limp mode while driving at highway speeds. One owner notes a turbocharger under-boost code and an oil leak associated with the turbocharger, which they were advised needed replacement. These incidents are flagged as safety concerns due to the sudden loss of power in traffic, posing a risk of accidents. The issues appear to arise without prior symptoms, and there are mentions of similar experiences by other owners on forums.
Owner complaints2
SUSPENSION
Owners of the 2021 GMC Terrain report issues related to the suspension, particularly at higher mileages around 45,000 to 64,500 miles. Common symptoms include severe shaking or wobbling during acceleration, specifically between 40-55 mph, which persists even after tire inspections and balancing. One owner mentions axle replacement and a transmission fluid leak, while another describes unrelated issues with backup assist features and windshield wiper fluid operation in cold weather. There are no reports of crashes or loss of control associated with these complaints, but potential buyers should be aware of the recurring shaking and related axle concerns at these mileages.
Owner complaints2
FUEL SYSTEM
Owners of the 2021 GMC Terrain report issues related to the vehicle's fuel system, specifically involving the fuel pump and fuel pump control module. Complaints frequently mention the vehicle stalling unexpectedly, both while driving at low speeds and when stopped, with no prior warning lights in some cases. Additionally, there are reports of the vehicle failing to start and battery drainage, often followed by an illuminated check engine light. These issues are noted at mileages around 25,000 and 86,000. While no crashes or fires are reported, the stalling incidents suggest potential safety implications, particularly during driving.
2021 Terrain recalls (2)
Every NHTSA safety recall logged against the 2021 Terrain. A VIN check confirms whether any recall remains unrepaired on a specific vehicle.
CHILD SEATNHTSA 23V339000May 11, 2023
General Motors, LLC (GM) is recalling certain 2020-2023 Chevrolet Equinox and GMC Terrain vehicles. The four rear-seat lower child seat LATCH anchorage bars may have excessive powder coating, which could prevent a child seat from being installed with the anchorage bars. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 225, "Child Restraint Anchorage Systems."
Consequence: The inability to install a child seat with the LATCH anchorage bars could result in an unsecured child seat, increasing the risk of injury in a crash.
Remedy
Owners are advised to install child seats using the vehicle's rear seat belts until the remedy is complete. Dealers will inspect the latch anchorage bars, and remove and replace the finish, as necessary, free of charge. Owner notification letters were mailed June 2, 2023. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232403240.
TIRESNHTSA 21V612000Aug 5, 2021
General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Equinox and GMC Terrain vehicles equipped with certain Hankook tires. The tires may have been manufactured with an insufficient amount of curative agent, which could cause tread separation.
Consequence: Tread separation can result in a loss of vehicle control, increasing the risk of a crash.
Remedy
Dealers will inspect the tire DOT numbers, and replace any affected tires, free of charge. Owner notification letters were mailed on August 31, 2021. Owners may contact GMC customer service at 1-800-462-8782; and Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N212343560.
Used-market value
2021 GMC Terrain resale snapshot
58.7%estimated value retained after 5 years
225listings in the model-level benchmark
Listing benchmarks establish a market range; trim, mileage, condition, title history and prior damage determine what one vehicle is worth.
With a 78/100 reliability score against a 72/100 segment average, the 2021 GMC Terrain rates above average. The data points to generally solid dependability rather than standout strength, but it lands on the favorable side of the segment. As year four of the current generation, it reflects a model that’s not in its earliest cycle.
Complaints are not dominated by a single system. They cluster most around the powertrain and electrical system, with smaller shares spread across brakes, engine, and miscellaneous reports. That distribution suggests a mix of issue types instead of one persistent fault pattern. Recall activity is limited, which helps keep overall exposure controlled.
Overall, the Terrain presents a moderate-to-low reliability risk for buyers.
What you get in a 2021 GMC Terrain report
✓Available title brand history
✓Odometer readings & rollback detection
✓Accident & damage records
✓Auction sales with photos
✓Open safety recalls
✓Theft & stolen vehicle check
Check a 2021 GMC Terrain now
Confirm exact options, recall completion, accident history, and odometer accuracy in minutes.
2021 GMC Terrain — Frequently asked questions
Is the 2021 GMC Terrain reliable?
With a 78/100 reliability score against a 72/100 segment average, the 2021 GMC Terrain rates above average. The data points to generally solid dependability rather than standout strength, but it lands on the favorable side of the segment. As year four of the current generation, it reflects a model that’s not in its earliest cycle.
How many recalls does the 2021 GMC Terrain have?
2 NHTSA safety recalls have been issued for the 2021 GMC Terrain. A VIN check confirms whether any remain unrepaired on a specific vehicle.
What are the most common 2021 GMC Terrain problems?
The most-reported 2021 GMC Terrain problem areas are: Power Train (6), Electrical System (5), Unknown Or Other (3).
Should I run a VIN check on a 2021 GMC Terrain?
Yes. A VIN report verifies title brands, odometer history, accident records, and recall completion on a specific 2021 GMC Terrain, complementing the model-year reliability data on this page.
