GMC Acadia owners claim messages say 'Shift to Park' when the SUVs are already in PARK.

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GMC Acadia Shift to Park Issues Cause Lawsuit
GMC Acadia owners claim messages say 'Shift to Park' when the SUVs are already in PARK.

— GMC Acadia "Shift to Park" issues have caused a lawsuit that alleges the SUVs fail to detect when the gear shift lever is moved to PARK, something that prevents drivers from shutting off and locking the Acadias.

The proposed class-action lawsuit includes all persons or entities in the U.S. that bought or leased 2017-2018 GMC Acadia SUVs.

According to court documents, the Acadia SUVs show a message on the instrument clusters that says shift to PARK even though the gear shift levers are already in PARK.

In addition to losing the ability to shut off and lock the SUVs, owners claim they must resort to all kinds of theatrics to get the SUVs to recognize they are in PARK. Drivers also say the batteries drain and GM has no clue how to fix the issues.

Plaintiff Marlaina A. Napoli-Bosse says she leased a new 2017 GMC Acadia, but in July 2018 the SUV showed a shift to PARK message as she attempted to shut off the vehicle. The plaintiff says the message shouldn't have been there because the SUV's shift lever was in PARK, yet she couldn't shut off the vehicle.

Considering she was on her way to daycare with her child, the plaintiff says she left the Acadia running and unlocked and later took it to the dealer. GMC technicians allegedly confirmed the problem but told the plaintiff there was no fix available.

According to the lawsuit, GM said it was working on a solution but didn't know when it would be ready, something that caused the plaintiff to park the Acadia.

Napoli-Bosse says she finally resumed driving the Acadia in August but continues to suffer from the shift to PARK problems, leaving her stranded multiple times inside the vehicle and unable to shut it down.

The plaintiff says she must continuously wiggle the shifter and repeatedly shift to other gear positions and back to PARK just to get the vehicle to recognize it is in PARK.

GM knows about the issues because the automaker sent a technical service bulletin (TSB PIT5616A) to GMC dealers in June 2018. The TSB talks about a shift to PARK message when the Acadia is already in PARK. The TSB further says the vehicle may not shut off when in PARK and may not start due to an "unknown" cause.

The Acadia TSB gives technicians directions in an effort to fix the issues, but in the end the bulletin says:

“Engineering is still investigating the root cause. DO NOT CALL GM Technical Assistant Center for an update on the PI. The PI will be updated to a bulletin once the final root is understood.”

Model year 2017 GMC Acadia owners complain about the same symptoms as the plaintiff suffered.

"Placed the vehicle in park, it was stationary and it rolled forward. Message in the info center said "shift to park". I was parking in a mall parking lot.this has occurred 5 times. I can push the gearshift back and forth and then it can be turned off and the message will disappear. I took it to the dealership and was told they are waiting on GM to see what can be done."

And the story is the same for 2018 Acadia drivers.

"When you put the shifter in park it does not recognize & cabin alarm starts to beep. The vehicle will also leave its headlights on overnight & drain your battery." Took to dealer and they [couldn’t] do anything about it."

The lawsuit alleges GM continues to benefit from selling and leasing defective SUVs as consumers are left questioning if they should have purchased the Acadia SUVs.

The GMC Acadia shift to PARK lawsuit was filed in the U.S. District Court for the District of Connecticut - Marlaina A. Napoli-Bosse and Brandy Smith, et al., v. General Motors LLC.

The plaintiffs are represented by Sergei Lemberg.

CarComplaints.com has complaints from drivers of GMC Acadia SUVs.

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