GMC · Canada · Mod
GMC Acadia: Structure
Affects GMC Acadia · 2007–2012 — about 36K vehicles.
The hazard
On certain vehicles equipped with a power liftgate system, the gas-filled struts (which help to raise and support the liftgate) may prematurely wear. These vehicles have a Prop Rod Recovery system intended to accomplish a controlled, slow return of the liftgate to the closed position if the liftgate’s gas struts are no longer capable of supporting the weight of the liftgate. The vehicle would provide audible warnings and flash the tail lamps to indicate there is a problem. However, the liftgate’s Prop Rod Recovery system software may be unable to detect/stop a liftgate with prematurely worn gas struts from falling too quickly after the liftgate is opened. This could allow the liftgate to drop suddenly, placing anyone beneath or near the gate at risk of injury. Correction: Dealers will reprogram the power liftgate actuator motor ECU with a new software and will verify power liftgate operation following the reprogram.
What to do
Contact your dealer; the remedy details were not included in the filing.