GM named the recalled vehicles as the 2013-2014 Buick Encore, Buick Verano, Chevy Cruze and the 2012-2014 Chevy Sonic. The affected vehicles are equipped with Calix oil pan/block heaters. The insulation on the engine block heater cord can become damaged in cold temperatures and cause the wires to be exposed.
Treaty power is a co-ordinated effort between the Executive branch and the Senate. The President may form and negotiate, but the treaty must be advised and consented to by a two-thirds vote in the Senate. Only after the Senate approves the treaty can the President ratify it. Once it is ratified, it becomes binding on all the states under the Supremacy Clause. While the House of Representatives does not vote on it at all, the requirement for the Senate's advice and consent to ratification makes it considerably more difficult to rally enough political support for international treaties.
The President may enter the United States into treaties, but they are not effective until ratified by a two-thirds vote in the Senate. In Article II however, the Constitution is not very explicit about the termination of treaties.