I took a two semester General Chemistry sequence and I've found it to be beneficial. We've since covered topics in physics that were also covered in chemistry such as thermodynamics. I'm taking Physics III (Modern Physics) this semester, and some of the topics are the kinetic theory of gasses and more thermodynamics, which were both covered in chemistry. We're covering light and optics this semester, and the light spectrum was covered in chemistry. It's not necessarily that having covered some topics in chemistry made it 'easier' to learn them in physics, but it has been helpful to see the topics approached from different perspectives. I enjoyed chemistry for its own merits as well, which could contribute to my take on it. I don't think it's strictly necessary for a physics major to take general chemistry, but I'm definitely glad that I did.
You may not be able to take the lecture without a lab. At my school, a lab component is required for the both semesters of the sequence. I always enjoyed my chem labs though, and I think more lab experience is always helpful.