What causes my 2013 chevy tahoe check engine light to come on?

The check engine light in Your 2013 Chevrolet Tahoe -- or any vehicle for that matter -- can come on for a huge variety of reasons. You'll need to check Your diagnostic trouble codes (DTCs) with an OBD-II scan tool in order to pinpoint. However, some of the most common faults are an evaporative emissions system leak, faulty spark plugs, or a bad sensor of some kind. If You think this is a wide range of issues, that's because it is; without more details, I can't nail down a specific component that's to blame, nor can I ballpark a repair cost. The check engine light is just a reminder to check Your DTCs, which will tell You specifically what Your problem may be.