if I replace the side-curtain airbags but NOT the seat airbag and send the module to you to be reset, will I still get a service indicator/airbag error?

The airbag module is linked to all your airbags, seat belts, and sensors. If any of these components are not functioning properly, the airbag module will store a code, causing the airbag light to remain on. To ensure your airbag system operates correctly, all components must be in good condition.