My light came on too. Sensors replaced. Still lit. Turns out the wiring harness has a break in it from the right front to the junction block (which conveniently snakes around the front of the engine...) on the left side of the engine bay. Gobble a couple of Tums before you ask how much that wiring harness is
. Only GM makes it. At least I got some of the $$ back from the sensor job.
Cheers,
Andy