I bought a 2019 Colorado LT 2wd extended cab V6..
Is there a way to find out what the original equipment/accessory list for this truck?
There is no original papers or guides for the truck.

 

Welcome from Florida. In the glove box there is a list with the build codes. You check these on the internet and it will show what the truck was equipped with. You can also do a vin check with the vin decoder in the tools tab on this site.