http://admissions.ucr.edu/WhyUCR/ourGuarantee#transferStudents
It looks like all majors are looknig for 3.0 +
Unless you have some Ds and Fs you can re-take it is almost impossible to move your GPA from 2.6 to 3.5 in a semester or two.
Why torture yourself? Head to a CSU, get a biz degree and get on with your life.