Total newb question about Abs
 

How would I tell if I have it on my runner? I am in process of buying a new or used brake booster and i need to know for sure whether it has ABS or not. I always assumed it didnt. Never seen a sticker or light on the dash saying abs. I never remember after hitting the brakes hard it doing the abs shake and rattle for lack of better term. I'd just hate to buy the wrong one......any help guys? Thanks in advance!!!!!

year? motor? there would be sensors at all four wheels, or just one on the rear differential in the center. rear wheel abs have the abs pump on the passenger frame rail at the front of the rig visible in the engine bay

ok thanks, by the way it is a 95 3.0 2wd