2006 Cadillac CTS

Runs and drives well however the brake lights do not go out which usually kills the battery overnight. The current battery is completely dead from boosting it to drive it. I was told the brake lights could be a brake switch. I just just took the old one out however the new one I ordered in did not fit. Even with these issues this car will get up to 150 no problem on the highway and I was driving it up until the winter with no issues besides the brake lights. Leather interior , sun roof, 2.8l. First 1500 takes it away. FIRM ON PRICE, that is a steal of a deal for this car. Bring a front post battery or a booster box and drive it away