This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
full bulletin at NHTSA ↗2009 GMC Acadia engine problems
severe 35 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
35
Recalls
0
Avg fix
$3,100
2fires
When does it fail?
Of the 35 engine complaints filed for the 2009 GMC Acadia, 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 35 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.
Among the 18 model years of GMC Acadia in our records for engine problems, this one ranks #3 by owner-complaint volume.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine 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 bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
full bulletin at NHTSA ↗This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
full bulletin at NHTSA ↗This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
full bulletin at NHTSA ↗This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of the 2009 GMC Acadia describe a pattern of critical engine failures centered on timing chain degradation, ignition coil failure, and related drivability issues. The timing chain problems appear as stretched or failing chains, often diagnosed when the check engine light comes on and power is lost—sometimes at highway speeds, creating hazardous merging situations. Some owners report the chain breaking off the camshaft sensor. Owners note that GM addressed some of these issues in TSBs but dealers reportedly withheld that information from owners who didn't receive a TSB directly.
Ignition coil failures recur throughout the complaint set, with owners replacing multiple coils in rapid succession despite recent repairs. One owner replaced three coils within four months of purchase. Owners report misfire conditions, hesitation under load, and charred spark plugs appearing within weeks of replacement.
Several owners describe catastrophic failures: complete loss of power on the highway, stalling without warning lights, smoke and fire from the exhaust pipe, and one vehicle that "blew up" during a test drive following timing chain work. A few owners mention stuck fuel injectors causing engine flooding and exhaust fire.
Valve cover venting problems are alleged to cause oil and ice deposits in the air inlet, requiring frequent spark plug replacement. One owner was told replacement plugs would be needed every 15,000–20,000 miles if valve covers weren't replaced.
Owners express frustration that GM's 120,000-mile coverage leaves vehicles beyond that mileage without manufacturer support, and multiple owners report dealerships refusing lemon-law claims or repairs after warranty expiration.
Same GMC Acadia engine reports on nearby years: 2007 · 2008 · 2010 · 2011 · 2012
Failure modes owners describe
Timing chain stretch and failure
Timing chain prematurely stretches, fails, or breaks off the camshaft sensor, causing loss of engine power, misfire, and check engine light. Some instances involve catastrophic engine destruction or fire.
When: 80,000–194,726 miles; some failures occur without warning on the highway
Symptoms owners cite: check engine light illuminates (often flashing); loss of acceleration and engine power; vehicle stalls at highway speeds; engine shake and tachometer flutter; jitter while driving; ticking or rattling noise from engine at startup; smoke or fire from exhaust pipe in extreme cases; diagnostic codes P0017 and P0008 (cam/crank position issues)
Codes mentioned: P0017, P0008, P0016, Timing chain wear diagnostic
Repairs/costs cited: Timing chain replacement reported at approximately $3,600; one owner quoted $4,000 for dealership repair and engine removal. Independent mechanics report the chain was stretched or broken. One owner attempted in-vehicle replacement due to cost constraints.
Recalls/TSBs owners mention: GM TSBs issued for some vehicles but not distributed to all owners. GM's 120,000-mile/10-year coverage does not apply to vehicles beyond 120,000 miles. One owner's repair at 23,500 miles was fully covered by manufacturer.
Ignition coil pack failures
Ignition coils fail prematurely and repeatedly, even after recent replacement. Owners report replacing multiple coils within short intervals, causing misfire and loss of engine power without warning.
When: 60,000 miles and earlier; recurring within weeks or months of replacement
Symptoms owners cite: check engine light comes on; engine misfire and hesitation; loss of power and poor acceleration; charred spark plugs; black smoke from exhaust; engine misses under load or on slight inclines
Repairs/costs cited: One owner replaced three coils within four months of purchase. Another replaced coils for approximately $623 at 60,000 miles. Owners note that GM has changed the coil design, suggesting the original coils were faulty.
Recalls/TSBs owners mention: No recalls mentioned for coil packs. One owner reported GM shifted to a different coil type but did not address failures in earlier vehicles. No warranty coverage mentioned for coil failures.
Valve cover venting and oil/ice deposits
Faulty valve cover venting allows oil and ice deposits to accumulate in the air inlet duct, contaminating spark plugs and causing check engine light and poor acceleration.
When: Mileage not specified; affects vehicles subjected to cold climates or regular driving
Symptoms owners cite: check engine light illuminates with 'pull over' message; poor acceleration; fouled and charred spark plugs; ice and oil deposits in air inlet duct
Codes mentioned: MIL on due to poor acceleration and deposits
Repairs/costs cited: Owner reported needing spark plug replacement every 15,000–20,000 miles if valve covers are not replaced. Valve cover replacement quoted but cost not specified. One independent shop diagnosed the issue; GMC dealer declined to cover the cost.
Recalls/TSBs owners mention: GMC customer service directed owner to local dealer, who stated they could do nothing and repair was owner's expense. No TSB or warranty coverage mentioned.
Fuel injector sticking and engine flooding
Fuel injectors stick in the open position, causing fuel lines and engine to flood and resulting in exhaust fire and smoke.
When: 23,500 miles
Symptoms owners cite: engine power reduced warning light; smoke and fire emitting from exhaust pipe; engine flooding
Repairs/costs cited: Fuel lines, catalytic converter, oil, and oil filter were replaced.
Recalls/TSBs owners mention: Manufacturer was made aware and covered all repair costs.
Engine stall and loss of power without warning
Engine stalls or loses power suddenly while driving at highway speeds, often without any warning lights or diagnostic codes until after the event. In extreme cases, the engine seizes or the vehicle becomes unsafe to operate.
When: Varies from 45 MPH to 194,726 miles; timing unpredictable
Symptoms owners cite: sudden loss of engine power while driving; engine stall without warning light; all warning indicators illuminate after stall; vehicle fails to restart; smoke from engine area; smell of gasoline in cabin; rough shaking and vibration
Codes mentioned: Timing chain failure, Cylinder #1 and #5 defect noted in one case
Repairs/costs cited: One owner's independent mechanic diagnosed timing chain and cylinder defects at 194,726 miles. Another owner reported the vehicle remained unrepaired. In one case, the vehicle was not safe to drive and eventually towed off the driveway.
Recalls/TSBs owners mention: Manufacturer stated no recalls were related to the engine failure. One owner was denied lemon-law claim because the vehicle was purchased in a different state than where warranty service was attempted. No manufacturer support mentioned for vehicles beyond 120,000 miles.
Uncontrolled engine acceleration at stop
Engine revs to 4,000–4,500 RPM while the driver has their foot on the brake, particularly when approaching a stop. The surge occurs suddenly and cannot be controlled by brake pressure alone; the ignition must be shut off to stop the engine.
When: Intermittent, occurring 6–7 times over several months; no specific mileage noted
Symptoms owners cite: sudden engine rev surge to 4,000–4,500 RPM while braking; occurs under identical circumstances (slowing to stop); requires full brake pedal force and ignition shutdown to stop; engine restarts and runs normally after the incident; time lag between occurrences (few months between episodes)
Repairs/costs cited: Dealership service department was unable to reproduce the issue during test drive or with a diagnostic monitor attached.
Recalls/TSBs owners mention: GMC was made aware when owner posted on AcadiaForum.net. At that time, GMC stated they had no other such issues reported.
Catalytic converter failure and emissions issues
Catalytic converters fail prematurely, often in multiples. Owners report one or two of the three converters needing replacement and recurring check engine lights even after repairs.
When: 80,000 miles and higher; recurring issues
Symptoms owners cite: check engine light illuminates; loss of power and hesitation; stalling while driving; code P0430 (emissions system)
Codes mentioned: P0430
Repairs/costs cited: One owner had two of three catalytic converters replaced by GMC dealer; check engine light returned afterward. Cost not specified.
Recalls/TSBs owners mention: No manufacturer action mentioned. One owner noted a recall for emissions but details not provided.
Camshaft actuator noise and malfunction
Camshaft actuator degrades or fails, causing loud, tractor-like engine noise at startup and during operation. Related to P0017 code and timing chain issues.
When: Approximately 140,000 miles
Symptoms owners cite: loud engine noise at startup; engine sounds like a tractor; exhaust pipes very loud; jitter while driving; poor acceleration response
Codes mentioned: P0017
Repairs/costs cited: Cam phasers and sensors replaced by owner; noise persisted after three weeks of work. Owner is a master technician and expressed frustration that the issue remained unresolved.
Recalls/TSBs owners mention: No manufacturer response mentioned.
Water pump seal leakage
Water pump develops a leak at the shaft seal, causing overheating and check engine warning. Occurs in cold/snowy conditions, making it unsafe for the owner to drive to a distant dealership.
When: Mileage not specified
Symptoms owners cite: check engine light and overheating warning; water pump leaking at shaft seal
Repairs/costs cited: Owner was towed to local shop rather than distant GMC dealer due to unsafe driving conditions.
Recalls/TSBs owners mention: GMC held owner responsible for repair cost due to distance from dealership; no warranty coverage or assistance mentioned.
Synthesized from 35 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
2009 GMC acadia coil pack failures. The coil packs fail without warning causing a loss of power from the engine. It can occur at any time. We had 2 failures since june of 2014. Both times we were in traffic and this loss of power created unsafe driving situations. *tr
I bought my GMC acadia, used with approx 50,000 miles on it and have owned it for less than 4 months and with in the last month have replaced 3 ignition coils and I am assuming will have to replace more. From my understanding there is no issue that is causing the coils to fail other than the part is going bad. And what I was informed is that GMC is now using a different type of ignition coil…
Tl* the contact owned a 2009 GMC acadia. The contact took the vehicle to an independent mechanic to have the timing chain replaced. While the mechanic was test driving the vehicle at 30 MPH, the vehicle began to smoke. The mechanic pulled the vehicle over and determined that the vehicle "blew up". The vehicle was destroyed. A fire and a police report were filed. There were no injuries. The…
Had engine trouble with your 2009 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 engine problem on the 2009 GMC Acadia?
It's a meaningful issue. 35 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Across the 28 complaints that reported odometer mileage, most engine failures cluster between 66,000 and 137,000 miles, with the median around 101,745. A quarter of owners report trouble before 66,000; a quarter make it past 137,000. 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/2009/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.