I hear a buzz sound for 5 seconds when compressor... Kenmore Frig-Model 106.9710680 age 16 Not a

Question

Kenmore Frig-Model 106.9710680 age 16 Not a very loud buzz sound is heard from bottom and front of frig. Temps are all good. Was thinking its the start relay, but it does not clicking sound. Then thought it was the over load relay. I see Sears Parts Direct sells the 1st for $36.53 and the overload for $40.86 and a Grommet for $5.03. If its either one of these relays should I buy the grommet too? Whats the grommet for?