Chevrolet Repair: squeaking noise, rotor surface, wheel speed

Question
I have had the front hubs replaced and the disc and pads replaced in the back. My abs and other brake lights come on but they don't stay on all the time. I have a squeaking noise coming from some where. I think it is in the rear but not sure.

Answer
HI THERESA,THIS MAY SOUND CRAZY BUT YOU WILL NEED 2 PEOPLE,, 1 TO DRIVE THIS AND ONE TO OPEN UP THE DOOR OR STAND OUTSIDE THE CAR WHEN YOU BRAKE TO PINPOINT THIS SQUEAK..YOU MUST FIND WHICH WHEEL IS SQUEAKING AND THEN ATTACK THAT WHEEL. MORE THEN LIKELY THE PADS ARE NOT SEATED CORRECT IN THERE MOUNTS OR A CALIPER SHIM OR GUIDE IS HTTING VERY SLIGHTLY ON THE ROTOR SURFACE CAUSING THIS SQUEAK.NO DANGER JUST ANNOYING. AS FAR AS THE ABS LIGHT ON THIS IS MORE THEN LIKELY A WHEEL SPEED SENSOR FAULT. THE SESNOR THINKS YOU ARE LOCKING THE BRAKES AND THE ABS COMPUTER IS RELEASING THAT WHEEL OR THERE IS A FAULT IN THE ABS MODULE..THE ONLY WAY TO TELL IS TO TAKE IT TO A SHOP THAT CAN SCAN YOUR ABS SYSTEM WITH A SCAN TOOL..THIS WILL TELL YOU WHY THIS ABS IS LIT.AT THIS POINT YOU CAN EITHER REPAIR IT OR LIVE WITH IT..THE RED BRAKE LIGHT WILL COME ON WHEN THE ABS LIGHT COMES ON,THIS IS NORMAL..JUST MAKE SURE THE BRAKE FLUID IN THE MASTER CYLINDER IS TO THE FULL MARK..