Your rights under California Lemon Law.
If you have taken your Buick to an authorized dealer for repairs, you may be eligible for a replacement or reimbursement of the vehicle purchase under the California Lemon Law (Civ. Code, § 1793.22).
The California Lemon Law applies to all car makes and models sold in California. It covers new and used vehicles as well as purchased or leased vehicles. If your Buick is defective and cannot be corrected in a reasonable manner, you may be eligible for relief under the California Lemon Law.