For future reference, here is some more information on the ABS hubs used on 2010 Camaros and 2008 on, Cadillac CTSs. (GMPD P/N 13500401, Timken P/N HA590260, SKF P/N BR930674)
- Gm uses an inductive pickup sensor (2-wire), rather than a Hall Effect sensor. (3-wire). The sensor is aligned through the knuckle to the back of the hub. The hub assembly has a magnetic seal encoder pressed into the back of the hub assembly that serves as both the bearing seal and a magnetic reluctor. Nobody I've spoken with at several hub manufacturers, knows what the number of magnets/poles is in the seal. I'll have to get a scope and count them myself.
The joys of evolving and ever changing technology...