No, Lemon Law does not typically apply to semi-trucks. Lemon laws are primarily designed to protect consumers, and since semi-trucks are not consumer vehicles, the laws don’t apply.
Still, if you purchased or leased a lemon of a semi, you should speak to an attorney. Even if you don’t qualify for compensation under state or federal Lemon Laws, an experienced attorney should be able to help you hold the manufacturer accountable for the defective vehicle under state commercial warranty laws.