Three problems related to body have been reported for the 2018 GMC Sierra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 GMC Sierra based on all problems reported for the 2018 Sierra.
The contact owns a 2018 GMC Sierra. The contact stated while exiting a parking lot, the passenger side running board detached from the vehicle causing minor damages to the passenger side of the vehicle. No warning light illuminated. No one was injured. The dealer was contacted but did not provide any assistance and advised the contact that the running board needed to be replaced. The vehicle was not repaired. The manufacture was contacted but did not provide any assistance. The failure mileage was 35,000.
Hood vent fell off while driving normal speeds on the highway and hit the car behind me. I feel that the cheap plastic is defective and could cause a problem with the part going airborne at high speeds and hitting other cars.
The rear end makes noise when turning and sometimes stoping. When weight is place on bed the rear end make noises. Something is wrong in the rear end of this truck. When truck is moving and turning you can here the noise.