Ok first of all the brakes suck on these trucks. I know duh right? Anyways got that off my chest. I've recently gotten a new issue. Any time my abs and brake lights have come on its been a blown wheel cylinder. My truck loves to do that 1 every year to 2 years. This time my wheel cylinders are still ok but my lights keep coming on and I get a clicking randomly in the brake pedal. Its an audible clicking sound. I thought it was in the front brakes until I noticed it was doing it waiting at a stop sign. Just a slow click every second like a clock ticking. My speed sensor is fairly new and my speedometer has been working fine so I don't believe that is the culprit. Brake fluid is full and brakes are bled. Any ideas? Oh and the truck only has rear wheel abs I recently replaced my wheel bearings they do not have sensors. Brake pedal is firm. Thanks in advance