This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
full bulletin at NHTSA ↗2015 Buick Enclave electrical problems
moderate Owners of the 2015 Buick Enclave have filed 13 NHTSA complaints about the electrical at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
Complaints
13
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2011 Enclave | 19 |
| 2012 Enclave | 17 |
| 2013 Enclave | 11 |
| 2014 Enclave | 23 |
| 2015 Enclave (this page) | 13 |
| 2016 Enclave | 4 |
| 2017 Enclave | 7 |
| 2018 Enclave | 7 |
| 2019 Enclave | 6 |
When does it fail?
Of the 13 electrical complaints filed for the 2015 Buick Enclave, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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
No new NHTSA electrical complaint has been filed on this vehicle in over 10 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical 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.
The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
full bulletin at NHTSA ↗This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491, E4492, or E6961 and resolution information.
full bulletin at NHTSA ↗This service bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.
full bulletin at NHTSA ↗This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2015 Buick Enclaves describe a wide range of electrical and systems failures affecting safety and basic operation. Airbag warning lights illuminate with no clear cause, and some owners report dealers refusing warranty coverage on salvage-title vehicles. A major cluster of complaints involves electronic door locks malfunctioning—rear liftgates pop open at highway speeds, doors lock and unlock repeatedly, and power door locks fail entirely.
Multiple owners report widespread electrical gremlins: tire pressure and service lights triggering together, the radio rebooting and losing connection to OnStar, speedometer and tachometer fluctuations, traction control warnings cycling on and off, and rear camera faults. One owner's vehicle lost speed from 70 mph down to 10 mph on the expressway with no diagnostic codes. Engine stalling mid-drive occurs, and one owner notes similar symptoms to a 2014 recall that doesn't apply to their 2015 model.
The side detection system fails repeatedly, even post-repair. Water intrusion into door wiring harnesses shorts entire audio and detection systems, disabling radio, blinkers, crash detection, and backup indicators. An AC failure sprayed refrigerant into the cabin at highway speed. One vehicle would not shut off without battery disconnect. Another has faulty wipers that only function on high and leak water inside. Multiple owners report multiple dealer visits yielding no diagnostics or repairs.
Same Buick Enclave electrical reports on nearby years: 2012 · 2013 · 2014
Failure modes owners describe
Airbag warning light and sensor faults
Airbag warning light illuminates with no clear trigger; passenger airbag shows as 'off' on display; dealers cite salvage title as reason to deny coverage
When: Varies; no specific mileage stated
Symptoms owners cite: airbag warning light on; passenger airbag disabled; seatbelt detection error suspected
Repairs/costs cited: Dealers refuse repair on salvage-title vehicles; cost not disclosed
Recalls/TSBs owners mention: Recall noted but not applied to salvage-title vehicles per dealer claims
Widespread electrical malfunction—multiple systems failing simultaneously
Multiple electrical faults occur at once: tire pressure warning, airbag service alert, side collision alert, radio reboots, heated seat controls inoperative, door lock buttons fail, turn signal noise intermittent, tachometer/speedometer lag, traction control cycles on and off, rear camera fault, liftgate inoperative, OnStar communication loss, compass malfunction. Handheld diagnostic scanner detects no errors despite active alerts.
When: 68,680 miles; onset abrupt
Symptoms owners cite: multiple warning lights and service alerts simultaneous; radio randomly shuts off and reboots; heated seats and power seat controls dead; door lock/unlock buttons unresponsive; turn signal audio intermittent; speedometer and tachometer readings erratic; traction control light cycling; rear camera service alert; liftgate will not open; gear select icon stuck on R while driving forward; OnStar communication failure; compass not working
Repairs/costs cited: No diagnosis obtained at dealership; appointment scheduled for 'big computer' diagnostic with owner expecting significant cost
Rear liftgate latch failure—door opens at highway speed
Rear liftgate will not stay closed; auto door opener disabled; manual opening required. Liftgate opened while traveling 70 mph. Mechanic suspects latch misalignment; quotes 150–175 dollars. Dealer aware of multiple customers with same problem.
When: Mid-life ownership; spontaneous occurrence
Symptoms owners cite: rear liftgate will not stay closed; auto door opener unreliable; door pops open at highway speed; door opens while parked at work
Repairs/costs cited: Aftermarket mechanic quotes 150–175 dollars for latch alignment/repair
Engine will not shut off—ignition switch or relay fault
Vehicle continues running after key removed from ignition and ignition button turned off. Requires battery, alternator, and finally power box cable disconnect to stop. Prolonged cranking issue; OnStar recommended battery disconnect.
When: Not specified; date noted 5/11/2011 in narrative
Symptoms owners cite: engine continues running with key removed; engine runs indefinitely despite off command; does not respond to ignition off
Repairs/costs cited: Battery disconnect, alternator disconnect, power box cable disconnect required to shut down engine; vehicle towed to dealership
Recalls/TSBs owners mention: OnStar advised emergency shutdown procedure
Door lock cycling—locks lock/unlock repeatedly while parked
Door locks cycle between lock and unlock repeatedly (7–9 times in second occurrence) while vehicle is parked. Gear shift display flashes in and out of Park during lock cycling. Owner suspects underlying disconnect in gear system.
When: While parked at drive-thru; also occurs in park
Symptoms owners cite: locks cycle lock/unlock repeatedly; gear shift display flashing in and out of Park; locks engage 7–9 times in succession
Loss of engine power on expressway—speed drops 70 to 10 mph
Vehicle loses speed from 70 mph down to 10 mph while on expressway. No diagnostic codes display. Dealer visited twice; same failure recurred on trip to Florida. Represents imminent risk of rear-end collision.
When: Expressway driving; also occurred en route to Florida; no mileage stated
Symptoms owners cite: abrupt speed loss from 70 to 10 mph; occurs while driving at interstate speeds; no warning prior to loss of speed
Repairs/costs cited: No codes retrieved; dealer unable to diagnose after two visits
Engine stalling while driving
Vehicle stalls multiple times mid-drive. Owner notes similar failure described in 2014 Buick Enclave recall but no recall exists for 2015 model. Dealer does not investigate due to absence of recall.
When: Mid-drive; multiple occurrences; no mileage stated
Symptoms owners cite: engine stalls while driving; multiple stalls reported; stalls in middle of road
Recalls/TSBs owners mention: No recall applies to 2015 model; dealer refuses investigation
Side detection system failure—repeated after repair
Side detection system fails; owner has had vehicle to dealership for this issue previously and failure recurs. 'Service side detection system' alert appears on dashboard every start. Represents redundant failure of same system.
When: 200 miles after 50,000-mile warranty expiration; previously repaired
Symptoms owners cite: side detection system failure notice on dashboard; side and rear alerts do not function; alert appears every vehicle start
Water intrusion in door wiring harnesses—system shorts
Wiring harnesses inside doors fill with water and short out entire audio and detection systems. Radio, blinkers, lane detection, crash detection, backup indicators, and OnStar all disabled by water damage.
When: No specific mileage or timing stated
Symptoms owners cite: entire audio system dead; radio inoperative; blinkers inoperative; lane detection inoperative; crash detection inoperative; backup indicators inoperative; OnStar inoperative; any sound-related vehicle system fails
Airbag and side detection lights blinking; headlight failure; wipers malfunction
Airbag warning light blinks; side detection light blinks and does not work; headlight inoperative; car stops running; wipers only function on high speed and leak water into cabin when it rains. Multiple sequential failures.
When: No mileage or timing stated
Symptoms owners cite: airbag light blinks; side detection light blinks; side detection does not work; headlight does not work; car stops running; wipers only work on high; water leaks onto driver's foot when raining
Repairs/costs cited: Scheduled for shop visit
AC refrigerant spray into cabin—highway speed loss of climate control
AC system fails catastrophically; refrigerant sprays through vents into cabin while vehicle is driven at highway speed. Owner unable to breathe; forced to pull over. Safety hazard from loss of visibility/breathing and vehicle control.
When: 19,000 miles on vehicle
Symptoms owners cite: AC system failure; refrigerant sprays into cabin; loss of breathable air in cabin; inability to operate vehicle safely
Fume odor from HVAC system—persistent despite filter change
Strong abnormal odor of fumes emits from interior when HVAC switched from AC to heat. Odor worsens as outside temperature drops and heat engages. Three dealership visits; first two unable to replicate; third changed air filter but odor persists. Affects eyes and nose. Manufacturer notified.
When: No mileage stated; weather-dependent onset
Symptoms owners cite: strong fume odor in cabin during HVAC mode change; odor worsens with heat activation; odor affects eyes and nose; random unknown odor composition
Repairs/costs cited: Air filter replaced at third dealership; failure continues
Recalls/TSBs owners mention: Manufacturer notified; no resolution documented
Synthesized from 13 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
Tl* the contact owns a 2015 Buick enclave. The contact stated that there was an abnormal odor of fumes emitting into the interior of the vehicle when the vent controls had been used from a/c to heat. The contact noticed that upon the weather change when the heat was activated, the odor was getting progressively worse. The vehicle was taken to two dealers, who were not able to replicate the…
Car loses speed from 70 down to 10 on expressway this is a life threading problem almost got rear ended on eway no where to pull off an dark out been to dealer in novi michigan 2 times car did same thing on way to florida no read out codes show on tracking I think gm should fix this problem free of charge before some 1 gets killed.*dt*jb
Hello, I’m writing concerning my Buick Enclave 2015. We have had it to dealership for side detection system failure in the past & are now incurring the same failure again! This is a big safety concern & hazard. Poor workmanship on General Motors/Buick.
Had electrical trouble with your 2015 Buick Enclave?
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 electrical problem on the 2015 Buick Enclave?
It's a documented issue but not catastrophic. 13 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 13 complaints filed, electrical issues most often appear around 74,428 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical 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 electrical?
No active recalls currently cover electrical 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/Buick/Enclave.
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.