What would drain a 1995 buick riviera battery It's not the alternator a brand new battery was put in It holds a charge less than 20 hrs?

If a 1995 Buick Riviera's battery drains within 20 hours despite having a new battery, potential causes could include a parasitic draw from an electrical component, such as a stuck relay, malfunctioning interior lights, or a short circuit in the wiring. Additionally, issues with the ignition system or aftermarket accessories could also be contributing to the drain. It’s advisable to perform a parasitic draw test to identify the source of the drain. If you find any components that remain powered when the vehicle is off, they may need to be repaired or replaced.