GPA: 3.56 (Straight C’s in freshman year, then straight B’s in sophomore year, straight A’s in junior year. Upward grade trend) 
SAT: 1290 (Taking it again)
Personal statement: Explained grade trend, my challenges and struggles, motivation, how I’ve gotten better in a subject, etc…
I’m worried. What are my chances?
Sorry no.
What if I done a lot of extracurricular?
Sorry UCs care so much on GPA nothing else matters as much as GPA and with your GPA around 2-5 percent of students at admitted. They were probably recruits for the football team.
What is your UC GPA since Freshman grades are not included in the calculation? https://rogerhub.com/gpa-calculator-uc/
Intended major? HS course rigor (# of AP/IB or DE courses)? EC’s? Subject test scores?
chance extremely small