Need brake help

Hi all I have a 1995 z28 trying to replace brakes only problem is trying to compress the caliper to install new brakes won't compress seems like something to do with abs I don't know I know on the pre abs all i had to do was compress caliper dosen't seem that easy all info would be apprecieated thank you

Try opening the bleeder screw then compress it.

would that be cw or ccw

i always just use a c clamp to do it never changed them on a new camaro but if uve waited too long to change them u may have locked up the caliper but thats not likely w/ a 95