Maybe fuel pump noise at start-up

[Ron McKuin]

When starting up my 2019 Yukon, after setting overnight, I hear a whining purring noise toward the back. Makes me think of fuel pump? Is this a known issue? Anything to worry about?? Thanks

 

[swathdiver]

When starting up my 2019 Yukon, after setting overnight, I hear a whining purring noise toward the back. Makes me think of fuel pump? Is this a known issue? Anything to worry about?? Thanks

You'll hear it more when the tank is low on fuel compared to when full. If you have the door open or it's quiet inside, you may also hear the pump run for a few seconds right after you put the "key in the ignition"; it's priming the fuel rail. All normal to me.

Also, if you have an air ride suspension, the compressor will run for a few seconds to prime the air shocks in the same manner as the fuel pump, also completely normal.