Quote Originally Posted by JohnC View Post
My Duramax did that. I recall there is a service bulletin on it. Problem was corrosion getting under the sensor mounting bracket and lifting the wheel sensor away from the tone ring.
With the salt here in E Tennessee that could well be the problem. Gut tells me its right front. Get cataract surgery early tomorrow so I'll have to wait a while to check further. But it will still be in the back of my mind till fixed. . . . .