The contact owns a 2020 Buick Encore GX. The contact stated while the vehicle was parked and attempting to turn off the vehicle, the message “Shift to Park" was displayed. The vehicle was taken to the dealer where it was diagnosed and determined that an unstated part in the gear shifter needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The…
2020 Buick Encore GX powertrain problems
moderate 15 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Complaints
15
Recalls
0
Avg fix
$2,500
When does it fail?
Of the 15 powertrain complaints filed for the 2020 Buick Encore GX, 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
Of the 5 model years of Buick Encore GX we track for powertrain problems, this one carries the most owner complaints on file — 15.
Powertrain accounts for 23% of all owner complaints filed against this vehicle, across 5 categories tracked.
The failure pattern owners describe
Owners describe two broad categories of failure. First, transmission and engine power issues: vehicles stall without warning at intersections and traffic lights with zero throttle response, sometimes causing dangerous backward roll into highway traffic. Check engine lights appear after stalls, and codes clear intermittently. One owner's transmission was found to contain 3 pieces of rubber debris; another entered limp mode with a confirmed P0299 turbocharger underboost code. Dealerships have replaced transmission components, lines, valves, and full transmissions, yet issues persist or recur within days. Second, a widespread shift-to-park sensor fault: owners place the vehicle in park, but a "Shift to Park" warning message persists, preventing engine shutdown and keeping electrical systems (radio, lights, locks) active for minutes. Multiple owners reference an existing Buick service bulletin and class action lawsuit for this exact issue. Dealers quote $400-700 for shifter assembly replacement, typically excluded from powertrain warranty coverage. One owner reports manufacturer approval of transmission replacement on backorder; another notes his VIN was excluded from a related recall despite identical failure. Service delays range from weeks to months, leaving owners without reliable vehicles.
Same Buick Encore GX powertrain reports on nearby years: 2022
Failure modes owners describe
Transmission slipping and stalling
Vehicle experiences gear slipping sensation, particularly with autostop enabled, followed by complete stalling at traffic intersections, stop lights, and highways with no engine response to throttle input. Engine/transmission codes throw after incidents but clear intermittently. One dealership inspection found 3 pieces of rubber debris inside the transmission.
When: Within first year of ownership; one failure at 9,529 miles
Symptoms owners cite: Sensation of gears slipping; Complete engine stall with no throttle response; No engine rev when pressing accelerator; Vehicle stalled backward onto highway traffic; Check engine light illumination; Engine/transmission fault codes (cleared after incidents)
Codes mentioned: Engine/transmission code (unspecified)
Repairs/costs cited: One transmission component replaced initially; issue persisted. Second dealership visit resulted in transmission line vacuuming; issue continued. Full transmission replacement ordered but on backorder at time of complaint. One dealer found 3 pieces of rubber inside transmission when disassembled.
Recalls/TSBs owners mention: Dealership initially dismissed as 'glitch' without documentation. Later approved transmission replacement under warranty after multiple service visits.
Unexpected stalling with RPM surge
Vehicle unexpectedly stalled in middle of intersection with simultaneous check engine light illumination and RPM surge to 6-8k range. Transmission replacement required. Owner advised VIN not included in related recall despite identical failure mode.
When: Unspecified mileage
Symptoms owners cite: Unexpected stalling in intersection; Check engine light illumination; RPM surge to 6-8k range; Safety hazard requiring towing
Codes mentioned: Check engine code (unspecified)
Repairs/costs cited: Transmission replacement required
Recalls/TSBs owners mention: Owner advised VIN not covered under related transmission recall despite same failure mode
Loss of engine power and turbo boost failure
Vehicle entered limp mode with loss of throttle response and acceleration. Check engine light and 'Engine Power Reduced' message displayed. Diagnostic testing confirmed turbocharger/supercharger boost condition failure.
When: Occurred when pulling out of service station
Symptoms owners cite: Check engine light illumination; Engine Power Reduced message on cluster; Loss of throttle response; Limp mode entry; Unable to accelerate despite full pedal application; Reduced power to powertrain
Codes mentioned: P0299 Turbocharge/Supercharge A Under boost condition
Shift-to-Park sensor/shifter malfunction
Vehicle displays 'Shift to Park' warning message when already parked, preventing engine shutdown and keeping electrical systems (radio, lights) active. Issue persists across multiple parking events. Dealer identifies shifter assembly or shifter control lever as root cause requiring replacement, typically $400-700 depending on parts/labor. Owner references existing Buick service bulletin and class action lawsuit awareness.
When: Multiple incidents over several months; one failure at 24,000 miles; one at 34,643 miles
Symptoms owners cite: Shift to Park message displayed when already in park; Engine will not turn off; Radio will not shut off; Dashboard lights will not shut off; Message persists several minutes before clearing; Message accompanied by audible ding sound; Inability to lock vehicle
Repairs/costs cited: Shifter assembly or shifter control replacement required ($400-700). One repair included shifter and wiring harness replacement. Parts not covered under powertrain warranty despite safety-critical nature.
Recalls/TSBs owners mention: Dealer awareness confirmed; manufacturer referred owner to NHTSA complaint process rather than repair authorization. Buick service bulletin exists for this issue. Class action lawsuit referenced by multiple owners. Parts not covered under powertrain warranty.
Transmission shift difficulty and lurching
Shifter malfunction prevents smooth transmission shift to park, requiring multiple attempts. Vehicle lurches during shift attempts as driver works to resolve problem.
When: Unspecified
Symptoms owners cite: Difficulty shifting transmission to park; Multiple shift attempts required; Vehicle lurching during shift attempts
Acceleration failure
Vehicle fails to accelerate as needed while driving at various speeds. One incident involved unintended forward lunge while reversing into parking space. Brakes and transmission valves initially replaced without resolving issue; subsequent full transmission replacement required.
When: 9,529 miles
Symptoms owners cite: Failure to accelerate as needed at various speeds; Unintended forward lunge while reversing into parking space
Repairs/costs cited: Brakes and transmission valves replaced initially; failure recurred. Full transmission replacement performed after manufacturer approval. Dealer found 3 pieces of rubber inside transmission.
Recalls/TSBs owners mention: Manufacturer approved transmission replacement; case filed
Synthesized from 15 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
For the past several months, my 2020 Buick Encore has been giving me a message to shift to park even though I placed my vehicle to park. This then does not allow my car to shut off, because it believes I am still in drive. I tried making an appointment with the dealership a month ago and their earliest availability was today, 12/10/2024. I took my Buick in, and they wrote me and stated that they…
Shift into park warning when car is in park
Powder Train When parking the car in garage, placed vehicle in park, then turned vehicle off, received a message on dash "SHIP TO PARK". The car was in park. Even thought the engine was off, it would now allow radio or lights to shut off util message goes off. Some times several minutes for it to go out. Taken it to the GM dealer ship was told shifter assembly needs replaced. I have learned…
Had powertrain trouble with your 2020 Buick Encore GX?
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 2020 Buick Encore GX?
It's a documented issue but not catastrophic. 15 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Based on the 15 complaints filed, powertrain issues most often appear around 22,724 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 $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/2020/Buick/Encore GX.
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.