what @eyemgh said. You can look at the various UCs to see their admit GPA. At Davis, for example, the 25% percentile weighted gpa was 3.92 (https://www.ucdavis.edu/admissions/undergraduate/student-profile) and you have a 3.8. While a 3.8 is pretty good, the competition is tough and you’d be in the bottom 25% of all admits. I suspect the gpa for engineering is even higher. So for you the UCs seem to be reaches.
No harm (except the expense) in applying to UCs but be sure to apply to the CSU campuses too, including your local one since they have local service areas.