GENERAL MOTORS issued a recall on the CTS model

On certain vehicles, a wax coating applied to the rear suspension toe link jam nuts may allow the nut(s) to loosen. Should this occur, a metallic clanking noise may be heard coming from the rear of the vehicle. Ignoring this warning could result in a further loosened toe link, which could eventually separate, allowing the rear wheel to turn inboard or outboard. If this were to happen, sudden changes in vehicle handling could occur, which could result in a crash causing property damage and/or personal injury. Correction: Dealers will clean all wax residue from the rear suspension toe link and install two new jam nuts. If required, the rear suspension toe link will be replaced.