It is hard to change front brake pads(no rotors) on a 2004 impala ls with a ts system.?

I have worked on older vehicles in the past but i was wondering if there is anything i should know about the anti lock brakes before i change the front pads.|||There is no difference in the calipers with anti-lock - the only thing that changes at the wheel is the addition of a sensor and a toothed ring which is part of either the wheel bearing or the axle joint.|||nothing is basically the same as the other cars you've done.|||There is a recommendation from GM (and most auto manufacturers) is to open the bleeder valve while you push the piston back into the caliper so that the old fluid does not go up the brake line and contaminate the ABS actuator. There has been some problems in the past of the old fluid in the caliper having moisture and metal flakes from corrosion causing problems with the actuator if just pushing the old fluid up to the master cylinder. You could bleed out all the old fluid first before changing the pads and that way you would not push any trash up to the unit.