General Motors Co said it is recalling 843 2014 Chevrolet Silverado and GMC Sierra crew cab pickup trucks because the passenger airbag may not fully inflate in a crash.

There have not been any known injuries or crashes related to the malfunctioning airbags, GM said.

The automaker estimates it delivered more than 40,000 of the trucks to dealers, GM spokesman Alan Adler said.

GM will call truck owners to ensure the vehicles are repaired. Dealers will fix affected vehicles that haven't been delivered to customers yet.

The redesigned 2014 Silverado and Sierra are the most important vehicle introductions for GM since its 2009 bankruptcy and US government bailout and are key to GM's ongoing battle with Ford Motor Co, whose F-150 truck is the auto industry's top-selling vehicle.

GM's current big trucks and related SUVs, which generate more than $12,000 per vehicle in profit, account for about 60 percent of the company's global earnings, according to analysts. Citi has estimated the new models could bring the automaker more than $1 billion in additional operating earnings in 2013 and 2014.