Sybil S St Louis , MO January 11, 2016 Appliance: Frigidaire Gas Range FGGF3031KQB Frigidaire Range Fggf3031kqb: Knobs on gas range. How to replace Knob Kit, Top Valve,Black. Replaced the knobs with the new ones I received from your company. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes