What would cause the front brakes to seize up even after you have new rotors, new calipers, new brake pads, new lines and a new master cylinder installed? Could it be the ABS pump or ABS module?

Did you do the work yourself? Did you properly lubricate the slide pins with the proper silicone brake grease? Did you properly inspect the front brake hoses? Did you check to see that the master cylinder is the correct one for the vehicle? Did you check or adjust the rod that actuates the master cylinder to make sure it is not applying the brakes constantly?

Answering both responses. Yes, the fluid was completely flushed twice. I did not do the work myself. A national chain has done the work. They are great guys but after spending 1900.00 so far, I'm concerned. To be fair, all of the components that have been replaced/rebuilt were in need. It is a work truck with 140k miles with a lot of town driving.

After checking this website, it seems that I'm hardly alone in my problem. Thanks to all the fine folks that go out of their way to help us find some answers. I've read about Speed Sensor shims and flexible brake tubing as possible culprits. I will speak with my mechanic ASAP!!!!

I have 2006 of same truck and had same issue. If you have been adding brake fluid over the past year, pop the hose off the booster. Check in there and see if you see fluid in the bottom. I had this on mine, so replaced booster, master (leaking in booster), new pads and calipers as they roasted on mine. Flushed all the lines and been working great.

'05 GMC, Here's what my issues was. Vin # was traced to problem batch where the master cylinder bled into the booster. It was found on a "bulletin board" site that dealers use. It diagnosed the issue, butit was such a small group that it didn't qualify as a recall, and the commonality usually happened after 80,000 miles. $1100 worth of work. Been over a year, no issues since. Still unhappy about this one.

05 Silverado.. I had the same problem with the fronts locking up after driving a few miles and not even applying them on long stretches after having replaced pads,shoes, wheel cylinders, front calipers,hoses and master cylinder. Flushed lines completely twice. Checked booster by removing vacuum line and using long nylon pull tie as a dipstick to verify there was no fluid present as others have noted. After reading many blogs and the mention of possible ABS problems without the light on I removed the ABS fuse, drove about 5 miles and the brakes were locking up and cool. Replaced the fuse and drove another 5 miles, braking alot and letting the truck come to a natural stop in neutral to see if it was still partially locking up and there was no indication of it locking up. Felt the fronts and there were not hot as they were earlier in the day when I drove it just a short distance. Would let it come to a normal stop coasting in neutral with no indication of a problem. Even stopped on slight inclines and it would then roll backwards after coming to a stop. Have not had the problem since and feel more could get the same results should they try this. Wish I had of thought of it or read it somewhere long ago to save myself alot of frustration. Hopefully others will benefit.

pullitmans is this a continued fix? i am having the same issues. Does it reset the ABS somehow?

i've found that as raybestos has sent manufacturing south of the border quality control sucks all readers please feel free to respond as i'm considering a class action email ktaent@gmail.com

If the front brakes are still seizing up after replacing the rotors, calipers, brake pads, brake lines, and the master cylinder, there are a few potential causes that you may want to investigate. While the ABS pump or module could be contributing factors, there are other possibilities to consider as well: Brake Hoses: Check the brake hoses that connect the calipers to the brake lines. If these hoses are deteriorated or collapsed internally, they can cause brake fluid to be trapped in the calipers, leading to brake drag. Brake Fluid Contamination: Contaminated brake fluid, which can occur due to moisture or foreign particles in the brake system, may lead to problems with caliper movement and cause the brakes to seize. Flushing and replacing the brake fluid might be necessary. Caliper Slides or Pins: Ensure that the caliper slides or pins are moving freely. If they are sticking or binding, it can prevent the caliper from releasing properly, leading to brake drag. ABS System Issues: While less common, issues with the ABS pump or module could potentially cause problems. The ABS system monitors wheel speed and modulates brake pressure during certain conditions. A malfunction in the ABS system could lead to improper brake operation. Proportioning Valve Issues: The proportioning valve distributes brake pressure between the front and rear brakes. If there's an issue with the valve, it could cause uneven pressure distribution, leading to front brake drag. Incorrect Brake Fluid: Ensure that the correct type of brake fluid is used. Mixing different types of brake fluid can lead to compatibility issues and affect brake performance. Wheel Bearings: Check the front wheel bearings. If they are worn or damaged, they can cause misalignment and lead to brake drag. Mechanical Binding: Inspect for any mechanical issues, such as a misaligned brake shield, that might be causing binding. Given the complexity of brake systems and the importance of safety, it's recommended to have a professional mechanic thoroughly inspect and diagnose the issue. They can perform tests, check for proper brake operation, and identify any issues that may be causing the front brakes to seize. If necessary, they can also use diagnostic tools to assess the ABS system.