Connection Time in GRU
 

I'm flying from LAX to GRU nonstop on a Korean Air flight and connecting to a TAM flight from GRU to GIG which is scheduled to leave 2 hours and 15 minutes after my first flight arrives. My flight from LAX is arriving at 11:55 am on a Saturday morning. Will 2 hours and 15 minutes be enough time to get through customs and to my next flight or should I change my connection?

I've been refused boarding on a domestic flight in Brazil when checking in slightly less than an hour ahead of take off.
If a number of international flights arrive at the same time, which is most commonly very early morning though, it can take over an hour, well over on occasion, to get through passport control, baggage claim and customs.

My one experience flying through GRU: Customs took less than 5 minutes. Late afternoon flight from Lima Peru. If you are an American the line will be shorter for you, as long as there are more Brazilians than Americans on your flight. What took the longest was getting my bag, that was maybe 30 minutes.

Personally I think you could make it but I would be more concerned with a flight delay. Any sort of delay out of LAX and you probably won't make it. I'd schedule a longer layover if possible.