While ordinarily good advice, raising your gpa at a CC, this is risky if the goal is to go to another UC campus. UCs limit junior transfers and many don’t allow senior transfers. See the chart at University of California Counselors Furthermore just because they say it is possible doesn’t mean they actually will accept any. Before doing this be sure to contact admissions at the UCs you are considering to find out their current policy.
Is this aiming at senior level transfers or Juniors?