2003 Pontiac Grand Prix V8
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just replaced front brake pads and now pedal is going to the floor i blead the front do i need to blead the back i removed the calipers to compress the piston

There was no need to remove the calipers at all
you need a helper to pump the brake for you
start the bleeding with rear right bleeder
then front left then rear left ending with the front right
keep checking fluid level and adding as needed