NHTSA, the nation's top auto safety regulator, has opened an investigation to determine if a recall of almost 3,000 2015 Chevrolet Colorado and GMC Canyon pickups should be expanded to cover more recent complaints.
In January 2016, General Motors recalled the pickups after complaints that the trucks lost their electric power steering.
NHTSA's Office of Defect Investigation reported receiving 50 complaints of lost power steering in the two nameplates beyond the initial recall. There have been no reports of crashes or injuries.
"NHTSA has opened a formal investigation into a past recall involving select 2015 Chevrolet Colorado and GMC Canyon midsize pickup trucks," GM said in a statement. "We will fully cooperate to support their investigation."