Speed limitor -govenor
 

I have a 2005 2500hd Sierra 6.0 l .Today I was driving down the hwy and I stomped on the gas to pass some trucks and The revs were up and all of a sudden my engine light starts to flash .So I take my foot of the gas and the light goes off.I did a redneck intake to the air filter box.What do you think the problem is? or should I go get it checked out. Is there a limitor on this engine? Thx Elvis