DETROIT -

In the larger of two campaigns, General Motors said on Wednesday that it is recalling 26,582 Cadillac SRX crossovers and Buick LaCrosse large sedans from the 2013 model-year in the United States to reprogram software that could allow the vehicles to slip from manual to automatic mode unexpectedly.

The automaker explained the issue was discovered on a 2014 engineering development vehicle.

GM said there are no reported customer cases nor are any crashes or injuries related to the condition known.

Franchised dealers will reprogram the transmission control module for free, according to GM.

In other developments, GM pointed out that the National Highway Traffic Safety Administration also posted a safety recall for four dozen 2011-model compressed natural gas (CNG) versions of the Chevrolet Express full-sized vans.

The OEM said the recall stems from a mis-built pressure release vent pipe that could allow natural gas to vent into the passenger compartment causing an explosion or fire risk.

“All of the 48 affected vans, which were sold to three U.S. fleet customers and one dealer, have been inspected under new vehicle warranty by the supplier who upfits the Express vans with CNG capability,” GM said. “There are no known crashes, injuries or fires associated with the issue.”

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