When it rains it pours. I was just driving my 2000 Blazer and was taking a left turn with some pressure on the brake going down a slight incline as I'm turning. The ABS light comes on and it is pulsing, it did the same thing last week in a left turn, no codes come up, thats the strange part. The wheel bearing was replaced two months ago but with the vehicle jacked up last week, there is no play up and down or sideways with the wheel. This leads me to believe it may be the sensor. I'll be yanking the wheel some night this week to check the caliper to make sure no bolts came out anywhere.

 

Sounds like a sensor may be dirty, try searching around for ABS Sensor Cleaning.