having problems with my brakes,i step on the brakes an sometimes it go;s to the on 2000 Chevrolet Silverado 2500

have had the truck for two months, be having problems with the brakes, i put new calipers on the back new pads all around the paddal feels spongy at times the padal goes to the floor making a sound in the front ?can any help?

Asked by for the 2000 Chevrolet Silverado 2500
You need to properly bleed the brakes.
i have bleed all the brakes, still spoungy an at times paddle goes to the floor feels sounds like abs , in the front ?