Tl* the contact owns a 2011 GMC acadia. The contact stated that after exiting the vehicle with the engine operating, the driver slipped on an ice patch and fell. While the contact was grounded, the vehicle erroneously rolled away and over her legs. The contact sustained muscle and nerve damage to both legs. The vehicle was being repaired. The manufacturer was not contacted about the failure. The…
2011 GMC Acadia powertrain problems
severe 30 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
30
Recalls
0
Avg fix
$2,500
2crashes
1fire
1injury
When does it fail?
Of the 30 powertrain complaints filed for the 2011 GMC Acadia, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 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 30 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.
No new NHTSA powertrain complaint has been filed on this vehicle in over 12 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: Avoid used 2011 GMC Acadias unless you accept the risk of sudden powertrain failure, transmission slipping under acceleration, and unpredictable loss of engine power on highway—multiple owners faced dangerous situations and five-figure repair bills. Gear shifter defects that allow parked vehicles to roll away and timing chain failures are documented complaints lacking GM recalls.
Owners of 2011 GMC Acadias report multiple serious powertrain failures. The most common complaint is sudden loss of engine power mid-drive—vehicle dropping from highway speed to 15–20 mph with dashboard warnings (Service StabiliTrak, Traction Control Off, Reduced Engine Power). This happens intermittently, sometimes clears on restart, and dealerships often cannot reproduce it or find fault codes. Some vehicles stall completely; one owner lost power on an incline and couldn't accelerate to safety.
Transmission problems are widespread. Owners describe slipping into neutral between gears—especially dangerous during highway merging—with engine revving 5,000+ RPM while transmission finds no gear. This recurs 2–3 times monthly for some owners over years of ownership. Others report complete transmission failure (one owner paid $3,200 to rebuild) or jerking upshifts. A few cite transmission overheating warnings after prolonged highway driving.
Several owners report timing chain failure causing complete engine shutdown mid-drive, with repair costs around $7,500. Driveshaft failure is also mentioned—one owner's shaft fell out while driving.
Gear shifter defects allow parked vehicles to roll away. Two owners report their vehicles rolled off driveways, and one was nearly hit by the moving vehicle. Another's vehicle rolled over her legs after she fell, causing leg injuries.
Engine mounts break repeatedly at low mileage. One fire incident is reported (vehicle running, doors locked, flames 6 feet tall). Dealerships often deny these are defects or claim behavior is "normal design."
Same GMC Acadia powertrain reports on nearby years: 2008 · 2009 · 2010 · 2012 · 2013
Failure modes owners describe
Loss of engine power / reduced power mode
Engine entering limp/reduced power mode with dash warnings (Service StabiliTrak, Traction Control Off, Check Engine, Reduced Engine Power) causing severe acceleration loss or inability to accelerate. Vehicle drops from highway speed to 15–20 mph or stalls completely. Occurs intermittently without consistent warning and sometimes clears on restart.
When: Across multiple mileage points; some as low as 30 miles (lease vehicle #20), others at 80,000+ miles. Occurs during highway merging, parking maneuvers, and at traffic lights.
Symptoms owners cite: Service StabiliTrak warning light; Traction Control Off warning; Check Engine light (intermittent); Reduced Engine Power warning; Severe acceleration loss or inability to accelerate; Vehicle stalls or stops mid-drive; RPMs may spike (engine racing) before loss of power; Throttle body issues identified in some cases
Codes mentioned: Check Engine light, Service StabiliTrak, Reduced Engine Power
Repairs/costs cited: Dealership diagnostics often clear faults before permanent repair; some shops replaced throttle body assembly (cost cited: $259.84 in #18); ECM replacement recommended in #2 but part unavailable from GM at time of complaint.
Recalls/TSBs owners mention: Dealerships unable to reproduce faults during test drives; one dealership stated reduced power behavior was 'normal' manufacturer design (#20); GM advised ECM part no longer manufactured (#2)
Transmission shuddering, slipping, delayed response, and flaring into neutral
Automatic transmission slipping into neutral, flaring between gears, shuddering, or losing power during acceleration. Occurs most often during highway merging at 45–60 mph when accelerator is released and re-engaged, stranding vehicle unable to accelerate in traffic. Some complaints report complete transmission failure; others report jerking on upshift or delayed throttle response.
When: Recurring 2–3 times per month to continuously, beginning early in ownership or at lower mileage (30 miles in #20, up to 132,870 miles in #11).
Symptoms owners cite: Transmission flares or goes into neutral between gears (4th/5th gears cited); Engine revs to 5000–6000 RPM with no gear engagement; Severe delay in acceleration response after throttle input; Transmission shudders or vibrates at 40–60 mph; Jerking during upshift from Drive; Complete inability to move forward despite gas pedal input; Transmission overheating warning ('Transmission Hot Idle Engine')
Codes mentioned: Check Engine light (inconsistent)
Repairs/costs cited: Owners report replacement of torque converter (#7), transmission rebuild ($3,200 in #23), full transmission replacement needed in #11. One owner noted damaged 'D plate' in transmission (#7) but replacement failed and problem recurred.
Recalls/TSBs owners mention: Dealership unable to reproduce faults or retrieve error codes during test drives; no recalls mentioned by GM for transmission defect in these narratives.
Timing chain failure
Timing chain breaks or fails, causing engine shutdown or severe degradation. Owners report sudden loss of power, vehicle stopping mid-drive, and inability to restart. Repair cost cited as $7,500.
When: Reported across mid to higher mileage (vehicle in #8 stopped suddenly on freeway; #10 failed causing deceleration and non-start; #17 at 136,000 miles).
Symptoms owners cite: Sudden loss of power or deceleration while driving; Vehicle will not restart after shutdown; Check Engine light or engine warning light; Complete engine shutdown mid-drive
Codes mentioned: Check Engine light
Repairs/costs cited: Repair cost $7,500 cited in #10; described as common issue requiring timing chain replacement. Owner in #8 noted this is a 'very common problem for this year and model.'
Recalls/TSBs owners mention: No factory recall mentioned in narratives; owners cite online research showing this is a widespread defect in 2011 Acadia.
Gear shifter malfunction (slipping out of Park, failing to shift to Park)
Gear shifter does not lock in Park position or slips out of Park with bumps or vibration, causing vehicle to roll away while parked. In one case (#6), vehicle rolled away in driveway while being cleaned with no key in ignition—shifter moved when passenger reached across seat. In another (#19), parked vehicle rolled over owner's legs after owner slipped and fell.
When: #6 at 71,796 miles (parked in driveway); #14 at 48,197 miles (could not shift into Park to turn off ignition); #19 at 34,994 miles (vehicle rolled away while running); #21 at 45,000 miles (vehicle parked, rolled off cliff); #25 at 80,000 miles (rolled backward at stop multiple times).
Symptoms owners cite: Gear shifter will not move into Park or stay in Park; Vehicle rolls away while parked; Shifter moves with light bumps or vibration; Cannot remove ignition key when shifter stuck; Vehicle rolls backward at stops or on inclines
Repairs/costs cited: Damage noted in #6: $2,300 in door damage plus $500 deductible; no repair solutions documented in narratives.
Recalls/TSBs owners mention: Dealership in #14 notified but offered no assistance; owner in #9 stated manufacturer claimed behavior was 'normal.'
Driveshaft failure and drivetrain mechanical damage
Driveshaft falls out or fails during operation; drivetrain bolt fractures. Owner reports driveshaft 'fell out while transporting passengers' (#5). Another reports heavy metal noise and fractured drivetrain bolt (#16).
When: #5 replacement mentioned after warranty expired (complaint made from 2013 onward); #16 at 125,000 miles.
Symptoms owners cite: Driveshaft falls out; Heavy metal noise while driving in traffic; Loss of drivetrain function
Repairs/costs cited: Owner #5 paid out-of-pocket for driveshaft replacement after warranty expired; #16 awaiting dealer repair for fractured drivetrain bolt.
Engine mounts breaking prematurely
Engine mounts fail repeatedly at low mileage intervals. Owner reports initial replacement at dealership, then recurrence by 33,000 miles despite careful driving on good roads.
When: First failure at unknown point, replacement by dealership, second failure at 33,000 miles (#12). Pattern suggests 16,000-mile intervals between failures.
Symptoms owners cite: Engine mounts fail or break
Repairs/costs cited: First replacement covered by dealership; subsequent failure occurred post-warranty.
Recalls/TSBs owners mention: Dealership initially replaced mounts but did not acknowledge pattern or recall.
Engine fire
Vehicle caught fire while running with doors locked. Fire grew to 6 feet tall before 911 responders extinguished it.
When: #24, July 27 at 4:00 pm (no mileage provided).
Symptoms owners cite: Vehicle fire with flames 6 feet tall; Engine running at time of fire; Doors locked, preventing hood access
Transmission overheating warning
Dash warning 'Transmission Hot Idle Engine' appears after 2+ hours of driving or at highway speeds (75–80 mph), forcing driver to slow down or park to cool transmission.
When: #27 (no mileage provided). Occurs repeatedly on sustained highway driving.
Symptoms owners cite: 'Transmission Hot Idle Engine' warning light; Vehicle unable to maintain cruising speed without warning; Transmission overheating on extended drives
Synthesized from 30 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
I was complaining about the performance of this vehicle to the dealer for the past three years. Now that the warranty is expired, I had to change the driveshaft, fell out while transporting passengers; transfer case, the transition from drive, the automatic shift would jerk; a passenger I had in the car told me one day I would not make it up a hill. One week later it happened. Transmission,…
Had powertrain trouble with your 2011 GMC Acadia?
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 2011 GMC Acadia?
It's a meaningful issue. 30 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 22 complaints that reported odometer mileage, most powertrain failures cluster between 67,000 and 125,000 miles, with the median around 78,780. A quarter of owners report trouble before 67,000; a quarter make it past 125,000. 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/2011/GMC/Acadia.
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.