If it is the door open chime that you are hearing, start out by removing fuse #7 (DRV MDL) from the rear fuse box. Does the chime stop? If so, after replacing the fuse, remove the door panel from the driver'* door. About halfway down and toward the front, you'll see the driver'* door module. Disconnect C2 that looks like this.
If the chime stops, the problem is likely with the door latch that contains the door open switch. If it continues, the problem is likely the driver'* door module. If the chimes continue regardless, the problem lies elsewhere.
Black 2000 SSEi, Silverstar Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, drilled 180 degree thermostat, Intense FWI, PCM, shift kit, and 3.4 Pulley. Solid front mount.