Stopped at Kwik Trip to get coffee before work one morning. Restarted Terrain and while leaving the SUV lost power and went into limp mode in heavy traffic. Car was towed to repair facility. Diagnosed as timing chain and guides failed resulting in major engine damage. Bill was $4302.85. Vehicle had 87397 miles on it.
2015 GMC Terrain engine problems
moderate 61 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
61
Recalls
0
Avg fix
$3,100
1fire
When does it fail?
Of the 61 engine complaints filed for the 2015 GMC Terrain, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 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 61 engine 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.
Engine accounts for 21% of all owner complaints filed against this vehicle, across 8 categories tracked.
The failure pattern owners describe
Buyer takeaway: The 2015 GMC Terrain with the 2.4L EcoTec engine carries significant engine risk, including rapid oil loss from rear seal failure (especially in cold weather), timing chain stretch/breakage, and excessive oil consumption—often with no warning lights until catastrophic failure occurs. Owners report engine replacement costs of $4,500–$9,500+, and GM has refused to recall the 2015 model despite issuing Recall 14882 for identical failures in 2012–2014 models.
The 2015 GMC Terrain's 2.4L EcoTec engine shows a pattern of failures that owners describe as recurring across many vehicles of the same year and engine type. The most common issue is rapid oil loss—not from visible puddles under the car, but from internal consumption and seal failure. Owners report adding 2–5 quarts of oil between scheduled changes, with oil levels dropping to zero despite no leaks on the driveway. Cold weather triggers a specific failure: ice forms in the PCV system, pressure builds inside the crankcase, and the rear main seal is forced out, draining oil in hours and leaving large puddles. Check engine lights often do not illuminate until after stalling occurs.
Timing chain problems are reported by owners starting around 52,000 miles. The chain stretches or breaks without warning—sometimes during long highway trips with no prior symptoms. When it breaks, gear teeth scatter throughout the engine, making it irreparable. Owners describe repair quotes jumping from $1,500 for chain replacement to $9,000+ for full engine replacement after inspection reveals internal damage.
Engine stalling and loss of power happen suddenly while driving or at traffic lights, creating dangerous situations. Oil consumption is blamed; when owners check the dipstick, they find no oil, yet there is no low-oil warning light. Dealers acknowledge this as a "known issue" with the 2.4L engine and piston rings, but GM has not expanded Recall 14882 (which covers 2012–2014 models) to include the 2015 model year.
Same GMC Terrain engine reports on nearby years: 2012 · 2013 · 2014 · 2016 · 2017
Failure modes owners describe
Rear main seal failure (PCV freeze / oil pressure)
In cold weather, condensation in the valve cover freezes, causing oil pressure to build and push out the rear engine main seal. Owners report large oil puddles and rapid oil loss without warning.
When: Cold weather (16°F, below 10°F); variable mileage (46k–109k reported)
Symptoms owners cite: Large puddle of fresh oil underneath vehicle; Rapid oil loss requiring frequent top-ups (2–5 quarts between changes); No warning lights until late in failure; Vehicle shaking/jerking before stall; Check engine light eventually illuminates
Repairs/costs cited: $1,648–$3,000 for rear main seal replacement; some owners report seals still leaking after repair; GM Recall 14882 applied to 2012–2014 models only, excluding 2015 despite identical failure mode
Recalls/TSBs owners mention: Recall 14882 covers 2012–2013 and 2014 Terrains; 2015 model excluded despite same engine and failure. Dealers refuse coverage for 2015.
Timing chain stretch/failure
Timing chain stretches or breaks, often with no warning. Stretched chain causes rough running and eventual catastrophic damage; broken chain allows gear teeth to fail, scattering metal fragments throughout the engine and rendering it unrepairable.
When: 52k–200k miles; can happen suddenly during highway driving or at rest
Symptoms owners cite: Engine noise (rough running, rattling, knocking, ticking); Check engine light; Engine stall or loss of power at speed; No warning before failure on long trips; Steering column shaking reported in one case
Codes mentioned: P0016 (crankshaft/camshaft position correlation)
Repairs/costs cited: $1,500–$9,000+ depending on extent of damage; if chain breaks and damages gears, engine replacement ($4,300–$9,500) often required instead of chain repair alone
Excessive oil consumption (piston ring / blow-by)
Engine burns 2+ quarts of oil between regular oil changes (sometimes in as little as 2–3 weeks), despite no visible leaks and regular maintenance. Owners report oil levels dropping from full to completely empty between scheduled changes.
When: As early as 46k–57k miles; can persist throughout ownership
Symptoms owners cite: Oil level drops rapidly (2–5 quarts every 1–3 weeks); No visible puddles or drips under vehicle; Engine knocking/rattling at low oil; Stalling or loss of power when oil depletes; Check engine light may not illuminate until oil is critically low or gone; Engine idle rough; vehicle jerks at stops
Codes mentioned: P0010 (camshaft position sensor A), P0011 (camshaft position sensor timing over-advanced)
Repairs/costs cited: Owners report frequent oil changes (every 2 weeks in severe cases); some mechanics suggest piston ring or valve seal defect; cost to diagnose varies; some dealers suggest rebuilding or replacing engine
Recalls/TSBs owners mention: Dealers acknowledge 'known issue' with 2.4 Ecotec engine and piston rings in earlier models; no recall or warranty assistance offered for 2015 model year despite identical failures
Engine stall / loss of power while driving
Vehicle stalls or loses power suddenly at stop signs, traffic lights, highway speeds, or in traffic with little to no warning. Check engine light may appear after stall or not at all. Restart usually restores operation temporarily.
When: Variable; reported from 45–70 mph and at complete stops; typically 46k–160k miles
Symptoms owners cite: Engine shuts off or stalls while driving or stopped; Loss of motive power at highway speed (can create safety hazard); Check engine light may illuminate before or after stall; Vehicle may restart and resume operation; No indication of pending problem before failure; 'Engine Power Reduced' message displayed; Hesitation or jerking during braking/at stops
Codes mentioned: P0016 (camshaft/crankshaft position correlation)
Repairs/costs cited: Underlying causes include oil starvation, timing chain damage, fuel pump failure, or camshaft phaser defect; repair costs range widely depending on root cause; some require full engine replacement
Fuel pump / oil gasket cross-contamination
Fuel pump leaks fuel into the oil gasket or crankcase, contaminating the engine oil. Causes jerking, stalling, and rough running.
When: Approximately 127k miles
Symptoms owners cite: Vehicle jerks and stalls at complete stops; Check engine light illuminates; Rough idle
Repairs/costs cited: Replacement of fuel pump, oil gasket, mass air flow sensor, catalytic converter, and starter; total repair cost over $1,000; failure recurred after repair
Recalls/TSBs owners mention: Dealer informed contact VIN not covered under recall; no assistance offered
Cylinder failure / exhaust valve leak
One or more cylinders fail due to exhaust valve leaks, causing complete loss of combustion in that cylinder. Leads to severe loss of engine function and potential fire risk.
When: Not specified; reported at mileage not disclosed
Symptoms owners cite: Vehicle stalls and steering column shakes; Engine rattling/knocking; Excessive oil consumption prior to failure; Check engine light illuminates only after cylinder fails; Engine shuts down
Repairs/costs cited: Cylinder #3 diagnosed as leaking from exhaust valves; previous class action lawsuit filed for 2010–2013 models for same issue; Missouri reportedly filing lawsuit for 2014–2017 models
Positive crankcase ventilation (PCV) system freeze / failure
PCV valve or system clogs or freezes in cold weather, causing pressure to build in crankcase. This forces the rear main seal out, resulting in complete oil loss and engine seizure. No warning indicators.
When: Cold weather conditions (below freezing); mileage variable (100k–160k reported)
Symptoms owners cite: PCV freeze causes sudden oil pressure spike; Large oil puddle under vehicle; Vehicle jerking and stalling; Burning smell before stall; Black smoke from rear during deceleration; No check engine light until failure is imminent; Engine rattling/noise as oil level drops
Repairs/costs cited: $2,500–$3,000 for rear seal repair when caught; if engine seizes, $4,500–$9,500+ for engine replacement; some repairs fail to resolve issue; secondary issues (timing chain damage, metal fragments in oil) discovered after seal replacement
Recalls/TSBs owners mention: GM issued Recall 14882 for 2012–2014 models covering PCV freeze issue; 2015 model not included despite identical failure; GM refuses to expand recall to 2015
Low oil / no-oil warning system failure
Oil level drops to zero or near-zero with no illumination of oil pressure warning light or check engine light. Owners discover empty oil reservoir during routine inspection or only after engine damage occurs.
When: Across all reported mileage ranges
Symptoms owners cite: Oil completely absent from dipstick; No oil pressure warning light; Check engine light may not illuminate until after stall or not at all; Engine rattling / knocking after restart with added oil; Stalling or loss of power
Repairs/costs cited: Dangerous because owners receive no alert; must check oil manually to detect problem; occurs despite synthetic oil (5,000-mile intervals) and oil change compliance
Timing chain cover oil leak
Timing chain cover develops oil leak, noted during routine maintenance or oil changes.
When: 200k+ miles
Symptoms owners cite: Oil leaking from timing chain cover area
Repairs/costs cited: Identified during oil change; no specific repair cost cited; dealer and manufacturer notified but offered no assistance
Recalls/TSBs owners mention: Dealer and manufacturer refused assistance despite acknowledgment of similar failures in other GM vehicles
Camshaft phaser defect
Defective camshaft phaser causes rough running, vibration, and oil loss. Check engine light illuminates.
When: 152k miles
Symptoms owners cite: Oil level drops despite recent oil change; Vehicle vibration; Check engine light
Repairs/costs cited: Diagnosed as defective camshaft phaser; not repaired; dealer unable to offer assistance
Cold-weather starting failure
Vehicle refuses to start in cold temperatures (below 10°F); lights and electronics function normally but engine will not crank.
When: At approximately 700 miles; recurs during cold spells below 10°F
Symptoms owners cite: No engine cranking in cold weather; Lights, radio, heater blower all functional; Vehicle towed but mechanics unable to diagnose or replicate
Repairs/costs cited: Multiple visits to dealer over several weeks yielded no diagnosis or resolution; issue persists
Synthesized from 61 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
The contact owns a 2015 GMC Terrain. The contact stated that while reversing out of her driveway, the vehicle started making abnormal knocking sounds. The check engine warning light illuminated. The contact parked the vehicle. An independent mechanic diagnosed that the battery was severely corroded and needed to be replaced. The contact stated that the battery was replaced; however, the failure…
Tl* the contact owns a 2015 GMC terrain. While the contact was checking the vehicle's oil level in his driveway, the oil pressure shot up from the engine without warning. The contact took the vehicle to lynch gm superstore (2300 browns lake dr, burlington, wi 53105, (262) 763-7500) in may of 2019 where it was diagnosed that the engine gasket needed to be replaced. The vehicle was repaired, but…
Engine died in the middle of the freeway when driving, creating hazardous condition. It was later found out there was no oil. Oil was changed less than 2000 miles prior by GM dealer, there was no leak on the garage floor and there was no warning that oil was low and the exhaust did not look any different. There was no way to tell the engine was burning oil. The engine had barely 110k miles.
Had engine trouble with your 2015 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 engine problem on the 2015 GMC Terrain?
It's a documented issue but not catastrophic. 61 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 22 complaints that reported odometer mileage, most engine failures cluster between 85,000 and 127,000 miles, with the median around 112,000. A quarter of owners report trouble before 85,000; a quarter make it past 127,000. 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 $3,100 for engine 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 engine?
No active recalls currently cover engine 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/2015/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.