General Motors said on Monday it will recall 42,140 sport utility vehicles in Canada from the 2014 through 2017 model years because the driver’s air-bag inflator may explode during deployment.

On Friday, GM said it would recall in the United States 994,763 Buick Enclave, Chevrolet Traverse, and GMC Acadia vehicles from 2014-17 model years with modules produced by ARC Automotive Inc.

GM is investigating the problem with help from an outside engineering firm, a company spokesperson said in a statement to CBC News.

The recall was done “out of an abundance of caution,” it said. 

Dealers in Canada and the United States will replace the driver’s air-bag module. The U.S. National Highway Traffic Safety Administration said Friday it was demanding the recall of 67 million ARC inflators, a request the company is resisting.