After fully paying off your ‘Buy Here/Pay Here’ car, disconnect the aftermarket GPS/starter bypass box under your dash. Always unplug the negative battery cable before any work.
I haven’t had to worry too much about this myself, but here’s my two cents: Once you’ve settled all the payments, that little GPS/bypass contraption can sometimes be more of a liability than an asset. I remember chatting with a buddy who mentioned that even though these devices promised to keep things in check during financing, they sometimes became a sticking point when it came to resale values or even when adjusting auto settings post-finance. And in today’s market—especially with interest rates on a roller coaster and lenders watching every little modification—the cleanest slate can only help. I ended up having a pro disconnect it after making sure every step was followed (battery off, proper wiring checks, the whole nine yards). It’s a small investment today that might save you from a snag tomorrow. 
Once your car is paid off, it’s in your best interest to remove that aftermarket GPS/bypass unit. In practice I’ve seen car owners run into issues when trying to make modifications or get the vehicle inspected later on. While it might seem like a minor addition, this device can limit your options and even complicate a resale down the road. Removal isn’t overly complex if you have some experience but proceeding with caution is key. A lot of times I recommend talking to someone who’s handled it before, or letting a trusted technician do it, to avoid accidentally leaving behind wiring issues or other complications.
Even if the device doesn’t seem problematic, leaving it installed can lead to unforeseen issues later. The bypass kit and GPS unit exist to control the vehicle while financing and their removal might affect the car’s performance or even its sale down the line. If you’re comfortable with basic electrical work, it’s smart to pull the unit after confirming all wiring connections, but if in doubt, a technician can safely remove it. Additionally, making sure all modifications are undone can save headaches during resale or if you decide to refinance.
I always felt a bit uneasy about leaving any sort of tampering device in my car once I finally owned it outright. I got my car through a similar financing deal and, even though I wasn’t ever in a situation where it broke something, I figured if I can clear one more little thing off the table, why not? It just seems like you’re cleaning house, making sure there’s nothing around that might someday complicate a resale or any future modifications. Of course, I’m no mechanic, so if you’re not comfortable doing it, it might be a good idea to get someone who knows what they’re doing. That said, if you trust your own hands, it can be a satisfying little DIY fix to truly reclaim your ride.
I’ve seen folks actually benefit by removing that gear once they’ve cleared the payments. I mean, sure, it’s not like it’s harmful when it’s in there, but it can bite you if you’re looking to resell or switch up the settings on your car later. I took a chance and disconnected mine once I was sure everything was running stable, and it didn’t cause any hiccups. That said, if you’re uneasy about it, getting someone experienced to handle it might be a safe call.