The brake cylinder may not compress properly due to air bubbles in the brake fluid, a leak in the brake system, or a malfunctioning brake cylinder.
Worn master cylinder.
The brake light switch might not be connected properly. Remove the brake light switch for 10 seconds and replace it to its original position.
Defective Master cylinder?
Chances are when a brake caliper wont compress it is the type that must be turned and compressed at the same time and requires a special tool that you can borrow from a local chain auto parts like Auto Zone. That was the case on my 96 Buick Riveria rear disk brakes. Hope this helps.
some model's that have the parking brake Incorporated into the rear caliper, you must compress and turn the piston until the proper clearance is obtained.
My Mom had the same problem with her truck.. It is due to a recalled part that is on the brake master cylinder
Yes, There are two sets of internal seals and a rear seal. The internal seals can fail and the cylinder will retain the Brake fluid, it just wont work correctly.
it wont stop. You will very likely push the seals out of the brake cylinder and have to repair or replace it and bleed the brakes
Brake Lights do not turn offUsually this is caused by the physical position of the brake light switch not being adjusted properly.
If you added brake fluid to the system it may be to full. try cracking open the bleeder valve on the caliper then tighten up the c-clamp or pop open the master cylinder resivour. Good luck
Chances are when a brake caliper wont compress it is the type that must be turned and compressed at the same time and requires a special tool that you can borrow from a local chain auto parts like Auto Zone. That was the case on my 96 Buick Riveria rear disk brakes. Hope this helps.
Chevy came up with the brilliant idea of turn in calipers a number of years back. Check the inside of the caliper piston cup. If you see a square depression in the center, it is a turn or twist in caliper. DO NOT try to compress it. You'll damage the caliper and increase your brake job costs. Chances are when a brake caliper wont compress it is the type that must be turned and compressed at the same time and requires a special tool that you can borrow from a local chain auto parts like Auto Zone. That was the case on my 96 Buick Riveria rear disk brakes.