New here so I don't know if I can reply to an old thread or if anyone will reply to me. Thanks for the detailed explanation because I'm wrestling with this is 2025. LOL I tried to read everything but I haven't seen my exact problem, which is... I bleed the brakes normally and have decent pedal. Then when I start the engine, the pedal drops almost to the floor, which from what I understand is pretty normal for an ABS system. The weird wrinkle I have is that when the pedal drops, it gets stuck there and the truck will only move if I give it a lot of power. Obviously the brakes are "stuck." I've read the hacks (jacking it up and "driving" it to fool the ABS, driving on gravel or ice to trigger the ABS, etc.) but I'm afraid to drive it because every time I apply the brakes they get stuck. I have to shut if off and wait, and eventually the pedal comes back up and/or I can lift it up. Then the whole thing starts over. Do you happen to know if this is still an ABS problem, or do I have a brake hose or a caliper problem? Thanks.

 

Jake, I think you need to start a new conversation versus resurrecting something this old.

I will say that I have the SAME exact situation as you with my 1996 C1500. I've replaced the master cylinder, and bled QUARTS of fluid through the system. However, there are times that the brake pedal drops to the floor, and then gets stuck, requiring me to hook my shoe under it to pull it back up. Usually happens if I am at a red light too long or in a restaurant drive through and not paying attention too. I've learned NOT to stand on the brake when starting the truck. Once you pump it a few times it is ok.

Someone else ran into this recently, and their only solution was to replace the brake booster. That is next on my list for the 1996 truck, when I have time, as I've done everything else. The truck, being a 1996, has ODB2, and my computer says there are small and large vacuum leaks, and I am suspecting this is part of the issue.