<p>Depends on the major and college. Most departments will have a flexible 4 year plan that you can add your GEs, minor requirements if you choose to have one, and electives to. I’d start by googling “UCSD [major] 4 year plan” or going to the department’s website, and cross-referencing that with your GE requirements. </p>
<p>I’ll also add that the only people I’ve met who have had trouble graduating in 4 are Engineering majors, people with double majors, and people who changed their majors reaaaaally late and to a really different major (so none of the requirements carried over). The vast majority of people (yes, even hard science/engineering majors) graduate on time, and I know quite a few people who have graduated in 3.</p>