Service Vehicle Light?
if you dont have a code reader... you can take it to any autozone and use theirs for free and see what code is coming up... their code reader will also clear the Check engine light... at least this will give you the code to know what to look for... if it is the O2 codes.. you can try using the rear corvette O2 sensors "BOSCH 131111's" they seem to clear up that problem

