Yes, a new or used replacement
Supplemental Restraint Module (SDM) on a 2003 Chevy Tahoe
needs to be programmed using a specialized scan tool (like a
GM Tech 2
or equivalent).
Failure to program the module will result in the airbag warning light staying on and the system not functioning correctly in the event of an accident. You will likely encounter a configuration error code, such as B1001.