What are my chances of getting into Med school with a C- in Gen Chem and Principles of biology.

Pre-Med & Medical School Careers in Medicine
7

Nothing is impossible, but is it probable?

Here’s a newer grid (using 2015 MCAT scores) of the table IWBB posted above.
https://www.aamc.org/download/321508/data/factstablea23.pdf

Matriculant GPA/MCAT grid broken by ethnicity.
https://www.aamc.org/download/321498/data/factstablea18.pdf

And here’s one broken by state of residence.
https://www.aamc.org/download/321502/data/factstablea20.pdf

Successful NY state applicants had mean MCAT score of 511.5; a mean sGPA of 3.63 and a mean overall GPA of 3.68.

Are you planning on applying to osteopathic medical schools?
I strongly suggest even if you blow the doors off on your MCAT with 515+, you still put in some applications to DO programs. Maybe 15 MD programs where your stats are competitive, including all your in-state publics, plus another 8-12 applications for osteopathic medical schools.

ETA matriculant data from AACOMAS for DO programs

http://www.aacom.org/docs/default-source/data-and-trends/2016-aacomas-applicant-amp-matriculant-profile-summary-report.pdf?sfvrsn=10

Mean sGPA 3.45
Mean GPA 3.55
Mean MCAT 503