Computer Science to Psychology Transfer UCLA

Hi I am going to be a transfer student and I changed my major from CS to Psychology recently. Will the CS major classes I took impact my admissions. Will they look at my GPA with the CS classes or just my major GPA? I am also thinking of taking Chemistry and Biology classes will those help for my undergrad admissions and pre-med? I want to be a strong applicant looking to go to UCLA. Thank you for the help!!