One problem related to grinding noise has been reported for the 1999 Chevrolet Blazer. The most recently reported issues are listed below.
I was driving highway speed when I heard a loud grinding noise in front end then a severe pull to my left which veered me off the road , luckily there was a grassy knoll to my left and not a guard rail. When I exited I found my front left wheel off . The shop said my wheel fell off due to a bad bearing. I found this odd due to my replacing both bearings a year before. Apparently its a common problem. Veh. Has 147k at this incident and only 126k when replaced parts the first time. In addition had 4x4 actuator replaced, fuel pump, oil cooler lines replaced, and pitman arm. . . All apparently common and frequent repairs with this vehicle !!.