Detroit : General Motors Co ., which has recalled about 20 million cars and trucks in North America this year, added 428,111 more US vehicles to that tally, including its redesigned full-sized pickups and large sport-utility vehicles.

GM said it needs to recalibrate software that controls the gears to fix the four-wheel drive on 392,459 pickups and SUVs, including the Chevrolet Silverado and GMC Sierra pickups from 2014 and 2015 model years and the 2015 Chevy Tahoe and Suburban. The effected models can switch into neutral on their own, the automaker said on Friday in an e-mailed statement.

If this occurs while a vehicle is in motion, no power will go to the wheels, the Detroit-based company said in the statement. If the vehicle is stopped or parked, it may roll away if the parking brake is not set.

GM, which said it isn’t aware of any crashes or injuries, has been recalling vehicles more frequently as it faces multiple investigations for its slowness in calling back 2.59 million small cars with ignition issues linked to at least 13 deaths. Since that action began in February, the company has recalled other cars for similar ignition issues, accounting for about 9 million of the fixes.

GM on Friday also said it’s recalling 29,019 Chevrolet Cruzes from model years 2013 and 2014 to replace the driver’s- side air bag inflator. The company said earlier this week that it was submitting paperwork to the US National Highway Traffic Safety Administration to do the recall to fix modules supplied by Japan’s Takata Corp.

Chevy Caprice

Two other recalls were announced. They include 1,939 Chevrolet Corvettes from model year 2014 to replace rear shock absorbers; and 4,794 Chevrolet Caprice police cars from model year 2013 and 2014, as well as the 2014 Chevy SS, to replace the windshield wiper modules if necessary.

GM said it wasn’t aware of any crashes or injuries to related to these issues.

So far this year, GM has recalled more than twice the number of cars and trucks in North America that it sold worldwide last year. By comparison, automakers are projected to sell 16.1 million new cars and trucks industrywide this year, according to the average of analysts’ estimates compiled by Bloomberg. BLOOMBERG

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