1500 or 2500???
The most common cause of that is the front brake rotors are out of round / warped. Replace rotors are have them turned.
no but it is recomended.
With a mechanic!
Remove brake caliper and caliper frame. Rotors are now free.
Front rotors could be warped. Replace
See below article-
replace front brake rotors and pads.
You will find that the front brake rotors are located behind the front of your wheel spindle, (behind your wheel and brakes). There you will see the rotors.
How to Install Front Brake Pads check related link below
How to Install Front Brake Pads Check Related links below.
with a 14mm wrench