Hi! GM has had a huge wheel bearing problem for a long time. Due to the poor design the ABS wheel speed sensors develop very wimpy signals to start with, then the wheel bearings develop a little play, which is normal, but in this case that's enough to let the speed signal drop out and set a fault code. In the case of wheel speed sensors the computer compares them to each other while you're driving. When a code is set for one of them, the computer knows it can't rely on that as an accurate reference for the others, so it won't run tests on them, and it won't set a fault code if a second problem occurs. Therefore , possible - and this was due to the wandering code . It's my opinion