I have a 2019 Chevy express 2500 that doesn’t have the keyless module is there a way to add it?

 

I wouldn't mess with it. It's just asking for problems down the road.

 

The dealership quoted me around $300 to set up keyless in mine. I found a Dorman kit that comes with the remote and a programmer. It was around $60, took me 30 seconds to set up, and has been working flawlessly for several years. Not sure if they have one for your year but here is the link:

https://www.dormanproducts.com/keyless