B0090 3A

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. 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.