Auto refinance with a co-signer on the original loan. Questions on process

I purchased a car a while back but I want to refinance the car for a better rate.

When I first purchased I had to have a co-signer.

How does that work. I want a loan to take over the payments myself. I believe the dealership actually put me as the co-signer and my family member as the primary. I have to double check everything

Im curious if I can get away from him and refinance this myself.