So I get this weird kind of knocking noise from my front end of my blazer when I'm sitting still in gear and idling. Its strange though because its only when my foot is on the brake pedal. As soon as I let off it stops instantly. This is odd and confusing to me any ideas guys

 

Motor mount?

 

Ain't considered that one yet good idea my man.

 

if you want to check if its the ABS pull the relay under the hood...if it still does it then not the ABS...Diaita is prob right though.

 

Could be anything that would vibrate under the hood when the engine idles a little rougher(normal) when in gear. Hood hinges for example.

 

I'd prefer the motor mount over the abs thanks yall