Yes, you can clean or replace the burner. You can find all parts on Sears PartsDirect: searspartsdirect.com/model/3opzfd692m-000582/kenmore-79032533411-gas-cooktop-parts
Here is the DIY repair guide for gas burners that don't light. It may just need to be cleaned: searspartsdirect.com/diy/symptom/gas-range-repair/1235943/gas-burner-won-t-spark-or-ignite/ran00025587999998988
This is the DIY repair guide (and video) for cleaning: searspartsdirect.com/diy/article/how-to-clean-grates-and-burners-on-a-gas-cooktop-video
For professional repair, call Sears Home Services at 1-800-4-MY-HOME.