2009 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 331 complaints citing each category; one complaint can cite several. Full breakdown on the 2009 GMC Acadia overview page.
What owners report
“THE CONTACT OWNS A 2009 GMC ACADIA. WHILE DRIVING APPROXIMATELY 20 MPH, THE VEHICLE JERKED WITHOUT WARNING. THE CONTACT ALSO STATED THAT SHIFTING WAS DIFFICULT…”NHTSA complaint 10628265 — filed 08/25/2014
“WHILE TURNING LEFT FROM A STOP SIGN, MY 2009 GMC SLT HAD AN RPM INCREASE AND FAILED TO CHANGE INTO A HIGHER GEAR. I WAS…”NHTSA complaint 10616264 — filed 07/25/2014
“I HAVE A 2009 ACADIA SLT2. I WAS ENTERING THE HIGHWAY AND ACCELERATING WHEN THE CAR WOULD NOT INCREASE IN SPEED AS I WAS MERGING…”NHTSA complaint 10616153 — filed 07/24/2014
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2009 GMC Acadia have transmission & power train problems?
Power Train is the #2 most-reported problem area on the 2009 GMC Acadia: 70 of 331 complaints on file (21.1%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2009 GMC Acadia have in total?
331 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 8 involved a crash, 14 involved a fire, 17 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.
