What exactly is grand larceny?
Grand larceny is a serious crime. It is when someone takes money or items that is worth over $2500. It is a more serious charge than petty theft or theft and comes with longer jail time.
It's completely up to the sentencing judge. If you were on probation for petit larceny and then committed GRAND larceny (a felony crime), the judge could reasonably assume you had not learned your lesson - revoke your petit larceny probation and send you behind bars for the remainder of the sentence - AND then - you would still face court action for the Grand Larceny. My guess is that you're looking at perhaps a year…
Larceny is an intentional and unlawful taking of a person's property. If you are charged with petty larceny, up to 500 dollars in theft, your sentence may be less depending on if there are any other charges that are attached to your case. However, if you commit grand larceny, over 500 dollars in theft, you are likely going to be facing jail time.