B0090 3A

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The SDM has received an ID message from the vehicle rollover sensor which does not match the ID stored in the SDM memory.
The SDM has reset the vehicle rollover sensor twice without detecting the correct ID message.