General Motors Co. said it is recalling nearly 20,000 new Cadillac SRX SUVs for faulty wheel lug nuts.

The Detroit automaker told the National Highway Traffic Safety Administration it is recalling 18,871 2013 SRX SUVs in the United States and nearly 1,000 in Canada over concerns that a wheel could eventually fall off.

GM has been investigating the issue of loosening wheel nuts since October 2012. GM said in January it determined that wheel nuts with a blue-tint Teflon topcoat could loosen. In March and April it received six reports for noise and other issues caused by loose lug nuts, but GM spokesman Alan Adler said the automaker has no reports of wheels falling off. GM said owners could experience creaking, rattling or grinding noises from the wheels or steering vibrations.

GM dealers will remove and reinstall the nuts and rotate the tires. GM notified dealers last week and will notify owners on June 3. It is the second recall of the 2013 SRX since March.