OP’s GPA (4.5 on a 5.0 scale, which presumably converts to 3.5 on the regular 4.0 scale) is below the middle 50% GPA range for UIUC engineering (3.70-4.00).
https://www.collegedata.com/cs/data/college/college_pg02_tmpl.jhtml?schoolId=982 says that UIUC considers academic GPA to be “very important”, but standardized tests as “important”, so a test-score-biased applicant like the OP is more likely to be disappointed.