<human>: Give me the gist of the text in a nutshell

When I got out of college in the early 2000's, I purchased my first car. I had no real credit history at the time, so my grandmother cosigned on my loan. The purchase was made in Pennsylvania. I later moved to North Carolina and had the title transferred. However, her name is still listed second on the title. After my grandfather passed away, she remarried. When her health deteriorated, her new husband's family forced him to abandon her to the care of my Aunt so that his wealth did not get used to take care of her. My Aunt was given power of attorney over her at that time, and my grandmother was moved to Colorado. My grandmother passed away in Colorado in the late 2000s. I would like to sell the car, but I cannot determine who needs to co-sign on the title to remove her name. My aunt says her PoA ended at my grandmother's death and that she can't help. My grandmother's husband's family says they think my aunt is the one who needs to sign it, and that they have no claim. My grandmother died with no estate to speak of, so no one had any reason to establish this until now. Can anyone shed some light on this issue and suggest how I should go about getting her name removed from the title? Do I need a lawyer? Thanks so much!
<bot>: Grandmother who was second name on my car title passed away. I am not sure who I need to sign the title to remove her name. Three states are involved.