This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
full bulletin at NHTSA ↗2010 GMC Terrain powertrain problems
moderate Owners of the 2010 GMC Terrain have filed 46 NHTSA complaints about the powertrain, typically surfacing around 74,100 miles at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Failure mileage
Complaints
46
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2010 Terrain (this page) | 46 |
| 2011 Terrain | 69 |
| 2012 Terrain | 36 |
| 2013 Terrain | 42 |
| 2014 Terrain | 33 |
1crash
1injury
When does it fail?
Of the 46 powertrain complaints filed for the 2010 GMC Terrain, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 46 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Among the 17 model years of GMC Terrain in our records for powertrain problems, this one ranks #3 by owner-complaint volume.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This service bulletin informs the technician of an alternate lift procedure that has been developed when the lift plate does not fit the top of the transmission case for 6T30, 6T35, 6T40, 6T45, and 6T50 Transmissions.
full bulletin at NHTSA ↗This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
full bulletin at NHTSA ↗This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
full bulletin at NHTSA ↗GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2010 GMC Terrain has a pattern of powertrain failures that occur at relatively low mileage. Transmission failures are the most common complaint—the transmission quits engaging or loses power while driving (sometimes without warning), with owners reporting replacement costs of $2,800–$4,000. Some vehicles simply won't move, while others lose drive after stopping at a light or on the highway. One owner's transmission failed and automatically shifted into reverse, nearly causing a rear-end collision. Warranty denials are typical when failures occur just past coverage limits.
Timing chain failure is the second major issue. Multiple owners report the chain losing tension and catastrophic engine damage with shattered plastic debris found inside. One independent mechanic stated this motor is "known for catastrophic failure." Engines need replacement or rebuild, with costs exceeding $3,500. Replacing the timing chain does not prevent the engine from burning excessive oil or failing again.
Excessive oil consumption happens without visible leaks. Owners burn 2–4 quarts between 3,000-mile oil changes and must check oil constantly. One owner lost 2.5 quarts in two days after timing chain repair.
The vehicle also enters severe limp mode—"Service StabiliTrac" and "Engine Power Reduced" warnings force speed reduction to 10 mph on highways without warning, creating accident risk. Dealers are unclear how to fix it. Engine stalling without warning, catalytic converter failure under 70,000 miles, and camshaft sensor failures round out the reported issues, with owners citing inadequate recalls and inconsistent dealer support.
Same GMC Terrain powertrain reports on nearby years: 2011 · 2012 · 2013
Failure modes owners describe
Transmission failure with loss of drive
Transmission stops engaging or loses power during driving, sometimes accompanied by inability to shift into drive or reverse, or the vehicle shifting itself into reverse without driver input. Multiple owners report transmission failure at relatively low mileage (30k–90k miles), with some vehicles losing drive capability after idling or coming to a stop. One owner reported the transmission failing and the vehicle automatically shifting into reverse while stopped at a traffic light, nearly causing a rear-end collision.
When: 30,000–90,000 miles; multiple occurrences reported over vehicle lifetime
Symptoms owners cite: Vehicle will not move despite engine running; Cannot engage drive or reverse; Transmission slipping or revving without forward motion; Delayed or no response when accelerating; Transmission light illuminated on dashboard; Occasional automatic downshift or upshift without warning; Transmission automatically shifting into reverse
Codes mentioned: P0325, P0326, P0327, P0016, P0017, P0014
Repairs/costs cited: Full transmission replacement required; costs reported at $2,800–$4,000 plus labor. One owner replaced transmission plus four computers; still experiencing issues. Repair shops cite broken wave plate as cause.
Recalls/TSBs owners mention: Many warranty denials reported when mileage slightly exceeded coverage. GM reportedly told one owner a transmission failure resulting in unintended reverse was 'not considered a problem.' No recalls issued by model year end of data collection period.
Timing chain failure and engine damage
Timing chain loses tension or breaks, causing catastrophic engine damage. Multiple independent mechanics report finding shattered plastic debris and loose timing chains. Some owners report the engine stalled without warning; others discovered the problem after noticing unusual noises. One mechanic noted this 'particular GM motor is known for catastrophic failure, which GM has failed or refused to acknowledge.' Engine rebuild or replacement needed.
When: Under 85,000 miles; timing chain replacement not preventing recurrence
Symptoms owners cite: Strange rattling or grinding noise from upper cylinders; Engine stalls while driving; Loss of power with check engine light on; Rough idle and hesitation; Shattered plastic debris found inside engine; Timing chain with no tension
Codes mentioned: P0420
Repairs/costs cited: Engine replacement or complete rebuild required, cost $3,500+. Replacement timing chain does not resolve underlying issue; oil consumption persists or worsens after timing chain replacement.
Recalls/TSBs owners mention: No TSBs or recalls explicitly addressing timing chain defect in provided narratives. Dealership fuel pump recall mentioned but not addressing timing chain.
Excessive oil consumption and burning
Engine burns or consumes oil at an abnormal rate between oil changes, sometimes without visible leaks. Owners report needing multiple oil changes in short timeframes and constant checking to prevent low-oil condition. One owner lost 2.5 quarts in 2 days after timing chain replacement. Another owner reports burning 2–4 quarts between 3,000-mile oil changes.
When: Multiple occurrences throughout vehicle ownership; often concurrent with timing chain or engine issues
Symptoms owners cite: Oil level drops between scheduled oil changes; No visible leaks under vehicle; No smoke from exhaust; Frequent need to refill or change oil
Repairs/costs cited: No specific repair noted; warranty company (Fidelity) denied coverage as 'normal wear and tear.' One owner refused to pursue full engine replacement due to cost.
Recalls/TSBs owners mention: GM Service Campaign (SCA) #14159 mentioned for oil consumption issue, with delayed response. Owner reports GM delayed repair for extended period, potentially compromising other engine components.
StabiliTrac and Engine Power Reduced limp-mode events
Vehicle enters limp mode with 'Service StabiliTrac' and 'Engine Power Reduced' warnings, forcing severe speed reduction (to 10–30 mph) or complete loss of power while driving. Warnings sometimes clear after restarting; other times recur repeatedly. One owner reports this happened three times in a short window. Events occur without check engine light or prior warning and pose serious highway safety risk.
When: Intermittent; multiple occurrences reported throughout ownership
Symptoms owners cite: Service StabiliTrac warning on dashboard; Engine Power Reduced warning; Sudden deceleration to 10–30 mph without driver input; Engine running but no drive power; Transmission light illuminated; Warnings clear after restart but recur
Repairs/costs cited: Dealers have replaced electronic link switches and other unspecified components, with inconsistent results. One dealer incorrectly blamed loose gas cap. Mechanics uncertain of root cause.
Recalls/TSBs owners mention: No TSBs or recalls addressing this specific failure pattern in provided narratives.
Engine stalling without warning
Engine shuts off completely while driving at normal speeds, including highway speeds, without prior warning or diagnostic indication. Restart may be difficult or require a few minutes. Occurs at low speeds (e.g., 5 mph in cul-de-sac) and highway speeds (35+ mph). One driver successfully coasted to safety; others nearly caused accidents.
When: Unpredictable; reported at various mileages and driving conditions
Symptoms owners cite: Engine completely shuts off while driving; Check engine light may appear only after stall; Difficult or delayed restart; Strange noises from engine before or after stall; No warning lights before stall event
Repairs/costs cited: Diagnosis challenging; shops suggest timing chain, but root cause often unclear. One owner purchased vehicle used (160k miles) with rough startup that never resolved despite catalytic converter replacement.
Recalls/TSBs owners mention: Fuel pump recall mentioned by one dealership but not confirmed to address stalling issue.
Catalytic converter failure
Check engine light illuminates with catalytic converter malfunction code. Owners report the part is damaged or bad on relatively young vehicles, with some under 4 years old or under 70,000 miles.
When: Under 70,000 miles; some reported on 4-year-old vehicles
Symptoms owners cite: Check engine light on; Power steering problem message
Codes mentioned: P0420
Repairs/costs cited: Catalytic converter replacement cost $1,125 reported by one owner. One shop cited excessive oil consumption as potential cause of converter fouling.
Recalls/TSBs owners mention: No recalls or TSBs explicitly addressing catalytic converter defects in provided narratives. Owners denied warranty coverage for out-of-warranty vehicles.
Cam actuator and sensor failures
Camshaft and crankshaft position sensor errors cause check engine light, power loss, or limp mode. One repair succeeded temporarily, then same issue recurred 2,000 miles later. One owner notes that a recall was issued for 2011 model year Terrains (Recall 11195 & 11195A) but not 2010, despite the same issues affecting both.
When: Various mileages; recurring after repair
Symptoms owners cite: Check engine light on; Engine power loss or reduction; Hard idling and unusual engine noise; Power steering problem message (sometimes displayed together)
Codes mentioned: P0325, P0326, P0327, P0016, P0017, P0014
Repairs/costs cited: Cam actuator replacement performed but problem recurred within 2,000 miles. Cost of repair not specified in narratives.
Recalls/TSBs owners mention: Recall 11195 & 11195A issued for 2011 Terrains but not 2010, despite identical failure modes reported on 2010 models.
Synthesized from 46 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Driving on the highway my car would not go. Car sensor prevented my car from moving because the wheel bearings went out on the used car I just purchased. The timing belt is also loose and the motor can seize up at any moment. My all wheel drive stopped working as well because of this. I had to put on my flashers and try to make it to an area where I could get off the highway. I called a tow…
Driving on highway, 65 MPH. Without warning the cars display said service stabilitrak and engine power reduced and immediately lost power. Cars coming up behind me fast, had to pull over, no power. Almost wrecked / died. Dealer says can't recreate issue and cleared codes. I'm afraid it will happen again. *tr
Had powertrain trouble with your 2010 GMC Terrain?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2010 GMC Terrain?
It's a documented issue but not catastrophic. 46 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?
Across the 35 complaints that reported odometer mileage, most powertrain failures cluster between 54,000 and 97,000 miles, with the median around 74,100. A quarter of owners report trouble before 54,000; a quarter make it past 97,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2010/GMC/Terrain.
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. Some links on this page are affiliate links.