The short list
Where the money goes wrong — and where it doesn’t.
✕ Years to avoid
The loudest year in the run. 214 complaints and five recalls. Nearly half the recent file is one failure — the brake vacuum pump quits and the pedal goes rock-hard with no warning. GM has bulletins for it and never issued a recall, so the repair is yours, and a seizing pump can destroy the engine.
The pump problem at its most concentrated. 184 complaints with roughly half tagged to the brakes, the highest share of any year. Same vacuum-pump failure, same absence of any recall — and unlike the 2019, no free charge-air-cooler program to offset it.
The oil-drinking 2.4L. 150 complaints. The engine burns oil with no leak and no warning light, starving a timing chain that mechanics price at about $2,700 to replace at a dealership. No GM oil-consumption coverage reaches this year.
Small file, one very loud pattern. Only 35 complaints, but roughly a dozen are the high-pressure fuel pump failing and stalling the car in traffic. Every dated failure landed between 12,825 and 48,256 miles, and GM's answer is a free Service Update, not a recall.
✓ Years to hunt for
The numbers collapse. 34 complaints, a fifth of the 2020 total and the quietest year here, with no single failure dominating. GM's vacuum-pump bulletins still name this year, so brake hard from a roll — but check that and it is the best Terrain in the run.
Still quiet, with one new question. 76 complaints, and part of that is chip-shortage feature complaints rather than anything broken. The fuel-pump pattern is beginning here though, so ask outright whether the car has ever stalled.
Same year. Different engine.
One badge, several engines — the year’s verdict assumes the riskiest one. Yours might be the calm one.
Which engine is in the one you found?
Where the years split by engine — the 2018 line divides two completely different TerrainsThe oil-drinker. The first-generation engine (2016–2017). It burns oil past the piston rings with no leak and no warning light, which starves the timing chain until it stretches and can skip a tooth — fatal on an interference engine. Mechanics do the timing chain, balance chain and water pump together, quoted at about $2,700 at a dealership. A frozen crankcase valve blowing out a main seal is the other common bill, around $1,500. No GM oil-consumption coverage reaches these years.
The turbo car's workhorse — and its problem child. The dominant second-generation engine (2018–2023), and the one behind nearly every headline failure. The brake vacuum pump bolted to it fails on 2018–2021 cars, turning the pedal to stone and sometimes taking engine internals with it, with GM bulletins but no recall. Add reduced-power faults from the charge-air-cooler duct, turbo failure just past 60,000 miles at $1,500–$3,000, and from 2022 the high-pressure fuel pump that stalls the car in traffic.
The uprated turbo, 2018–2019 only. Optional above the 1.5T and genuinely quick. A dealer who services these reports major oil leaks as near-universal on the second generation, and notes the upper oil pan on the 2.0L is roughly a fifteen-hour job — labour that dwarfs the parts. Mechanics also flag direct-injection carbon build-up on the intake valves, cracked pistons in some early examples, and cooling-system leaks.
The rare diesel, 2018–2019. Excellent highway economy and strong torque, with modern-diesel headaches behind it. GM wrote a Service Update just for the 2018 cars, covering a misaligned clamp between the turbocharger and the catalytic converter that can leak exhaust and smoke under the hood. Beyond that: EGR and particulate-filter clogging, DEF system faults, and expensive emissions repairs, all worse on short city trips. Rare enough that a diesel specialist inspection is worth paying for.
Partial split: the 3.6L V6 offered on higher first-generation trims has no engine-specific failure pattern in our sources, so it gets no row. The VIN encodes which engine you're looking at — paste it and we'll tell you which row applies, plus its open recalls.
Decode my VIN — freeEvery year, rated
Each verdict links to the full report: known issues with real repair costs, open recalls, and the print-and-go inspection checklist.
The old 2.4L that quietly drinks oil — worth buying only with a documented timing-chain history.
150 complaints · 2 recalls
Full report →The last of the old Terrain — one recall on the page, but the purest engine-complaint year in the run.
133 complaints · 1 recalls
Full report →The loudest year in the run — a brake pedal that turns to stone, and a pump that can take the engine with it.
214 complaints · 5 recalls
Full report →Hard brake pedal and lost engine power both peak here — but this is the one year GM paid for the power fix.
177 complaints · 3 recalls
Full report →The brake-vacuum-pump cluster hits its most concentrated point — the last of the loud Terrain years.
184 complaints · 2 recalls
Full report →The complaint file collapses to 34 — but the brake pump is still in it, and GM's bulletin still names this year.
34 complaints · 2 recalls
Full report →A quiet-looking year where a new problem starts — the fuel pump, and the stalls that come with it.
76 complaints · 2 recalls
Full report →A small complaint file with one very loud pattern — fuel pumps failing under 50,000 miles and stalling the car in traffic.
35 complaints · 2 recalls
Full report →Two badges, one car. The old 2.4L drinks oil until the chain goes; the turbo car turns the brake pedal to stone. Know which Terrain you're standing in front of.
Shopping Terrain years? We’ll watch them for you.
New recalls, federal investigations, and quiet warranty-extension programs land months after you buy. Tell the canary which years you’re considering — it sings when something changes.
Watch my years — freeCross-shopping?
Same class, checked the same way: