The 2017 Equinox (second-gen platform) is generally solid but the 2.4L Ecotec has serious oil consumption issues leading to catastrophic engine failure, while both engines share some transmission cooler and mount concerns that are more nuisance than disaster.
2.4L Ecotec Excessive Oil Consumption & Piston Ring Failure
Common · high severityTypical onset: 60,000-120,000 mi
Symptoms: Low oil warning light between changes, needing 1+ quarts per 1,000 miles, Blue smoke from exhaust on cold start or acceleration, Rough idle, misfires, and eventual rod knock if oil runs critically low, Check engine light with P0300-series misfire codes
Fix: Piston ring replacement requires complete engine disassembly (12-16 hours), but most engines at this point need full rebuilds or short block replacement due to cylinder wall scoring. Many owners trade or scrap rather than repair. 14-18 labor hours for short block swap.
Estimated cost: $4,500-7,500
Transmission Oil Cooler Line Leaks
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Transmission fluid spots under vehicle, usually passenger side, Low transmission fluid warning or harsh shifting, Pink or red fluid visible near radiator or frame rails
Fix: Cooler lines corrode where they connect to radiator or run along subframe. Replace both lines while you're in there (3-4 hours). Sometimes involves dropping subframe for access depending on routing.
Estimated cost: $400-750
Transmission Mount Failure
Common · low severityTypical onset: 80,000-130,000 mi
Symptoms: Clunk or thud when shifting from Park to Drive or Reverse, Vibration at idle that diminishes with RPM increase, Excessive engine movement visible when accelerating hard
Fix: The rear transmission mount (torque strut) tears internally. Straightforward replacement, 1.5-2 hours. Use OEM or quality aftermarket—cheap ones fail in 20k miles.
Estimated cost: $250-450
Timing Chain Stretch (3.6L V6)
Occasional · high severityTypical onset: 100,000-150,000 mi
Symptoms: Rattle on cold start for first 3-5 seconds from front of engine, Check engine light with P0008, P0009, P0010, P0011 (cam/crank correlation codes), Reduced power or rough running as stretch worsens
Fix: GM's 3.6L timing chains stretch with age and poor oil change intervals. Requires both primary and secondary chains, guides, tensioners, cam phasers—essentially the full timing kit. 10-14 hours labor, front-wheel-drive access is tedious.
Estimated cost: $2,800-4,200
EVAP Purge Valve and Vent Valve Failures
Occasional · low severityTypical onset: 50,000-90,000 mi
Symptoms: Check engine light with P0496, P0442, P0455 (EVAP system leak codes), Rough idle or stumble immediately after refueling, Fuel smell near engine bay
Fix: Purge valve sticks open or vent valve fails closed. Both are inexpensive parts but sometimes requires smoke testing to confirm. Purge valve: 0.5 hours. Vent valve (near fuel tank): 1-1.5 hours.
Estimated cost: $150-400
Power Steering Pump Whine and Failure
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Whining noise when turning, especially at low speeds or cold temperatures, Intermittent loss of power steering assist, Fluid leaks from pump or high-pressure line
Fix: Hydraulic power steering pump bearings wear or seals leak. Pump replacement is 2-3 hours. Flush system and check for metal contamination in fluid—if present, replace rack too or it'll kill the new pump.
Estimated cost: $450-850
The 3.6L V6 model is a decent used buy if well-maintained; avoid the 2.4L Ecotec unless you have oil consumption documentation proving it's clean—too many grenaded engines to gamble.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.