I have a 2006 Chevy Silverado 3500 that when coming to a complete stop feels like the anti lock system kicks in every stop. When this happens the truck continues on a little further (as if something were slipping) before it comes to a complete stop. Has been going on for 2 years.

Without a test drive i would have no idea to be honest only what has alrerady been suggested ,i would suggest that ask a local mechanic to have a drive then post what he/she says ,as for the OBDII code reader forget it as the ABS system cannot be read from the OBDII ,well not in europe anyway and i would test all sensors with a automotive test meter then go from their as the fault is no doubt mechanical within the ABS unit on the vehicle and without as drive my self i honestly couldnt say

Sorry it took so long to get back to you.
First is the anti-lock brake light on! If so It might be a faulty anti-lock sensor or water in the plug making it give off the wrong reading or could be just unplugged

BUT If the anti-lock drake light is on have some one put a OBD2 reader on your truck

Good Luck!