2018 GMC Acadia Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train ranks on this vehicle
Share of the 388 complaints citing each category; one complaint can cite several. Full breakdown on the 2018 GMC Acadia overview page.
What owners report
“GEAR SHIFTER MOVES TO PARK POSITION BUT INDICATORS AND ENGINE OFF SWITCH WILL NOT SWITCH TO PARK STATE WITHOUT JIGGLING SHIFTER HANDLE TIP.”NHTSA complaint 11339369 — filed 07/14/2020
“SHIFT TO PARK . WOULD NOT SHUT DOWN OR COULD NOT LOCK VEHICLE. WARNING LIGHT & BEEPING SOUND.”NHTSA complaint 11330940 — filed 06/25/2020
“MY CAR KEEPS GIVING NOTICE OF IT NOT BEING IN PARK, WHEN ITS CLEARLY SHIFTED INTO PARK. IT WONT SHUT DOWN, LET YOU LOCK DOORS…”NHTSA complaint 11329198 — filed 06/16/2020
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2018 GMC Acadia have transmission & power train problems?
Power Train is the most-reported problem area on the 2018 GMC Acadia: 149 of 388 complaints on file (38.4%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2018 GMC Acadia have in total?
388 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 8 involved a crash, 1 involved a fire, 12 reported injuries, and none reported deaths.
What does NHTSA's power train category include?
NHTSA groups complaints about the transmission (automatic or manual), driveline, axles, transfer case and related parts under a single component category called POWER TRAIN. This page reports that category as NHTSA defines it.
