I purchased a vehicle there and also a warranty im selling my vehicle should i cancel the warranty before or after i sell it ? Thanks

After you sell it

Just depends on how much time you can devote to the process

Come in the day after you sell it. Make sure you bring in a Bill of Sale showing how many miles were on it since they prorate it by time or by the miles...

Before. They will give you a refund on the portion you haven't used (based on time). I just did this with a corvette I bought from them