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check for a rusted brake line under the module if the lines look good then the module has a leak and these are not rebuildable by any one other than a rebuilder. you will have to replace the module.
so let me get this straight-you had a brake line that rusted through and you are replacing it from like the rear block that separates the rear wheels to the abs unit and you lose which line is which when it passes around a body mount and goes up the firewall. what I would do is push and or pull that line-take it out of the clips that hold it along the way-tracking until you reach your destination-brake lines are a nasty job-ask your auto parts guy about the newer more flexible brake line that can be bent by hand-they are wonder full-also I make all the connections up with a flanger flair tool and you should get a small pipe cutter so so the ends will be nice and straight-cheers Denny
Had same problem. Lift up rear seat on drivers side and you will see a steel tube running from the wheel arch under the seat. Tube is about 2 inches wide. If this is rusted underneath then water is getting via the wheel arch open end of the tube. It runs into the rear foot well and forward into drivers footwell, also runs under rear seats and into the boot! I removed the rear drivers side wheel, pulled away the plastic wheel arch lining then sealed the hole where the wiring leads through this pipe. Covered it with plastic flashing replaced the wheel arch lining. Took 30 mins to repair, took a week to dry the carpet, rear seats and boot carpet.
This is your electronic brake control module(ebcm).This is the module for the anti-lock brake system.The module is located on the inside of the frame just below the drivers seat area.The problem is the electrical part of the module.This is the top part of the module and you don`t have to disconnect any brake lines.It also isn`t in the easiest of places to work in.The 4 screws that hold it down are torx head screws and being in the area that they are in it can be difficult to remove because of rust.The other thing is this module is not cheap.If you don`t want it to drain the battery and don`t want to fix it right away then you can just remove the abs fuse in the under hood fuse panel.But you will not have anti-lock brakes.Just the regular brake system.If you do decide to replace it make sure you clean the area very good before starting because you don`t want dirt to get into the module when you take off the top part.Remember do not undo any brake lines.The fuse is a maxi fuse this means it is one of the big ones.Hope this helps.and let me know if you have any more questions.Good luck.
you most likely have a brake line rusted threw, cut the line ahead of the leak and after the leak and splice in a new piece of brake line, it will have to be steel, you can not use rubber. if you take the line to a parts store they can size it up and get you a piece of steel line and some pressure fittings to put it back together, after you repair the line then you will need to bleed the rear brakes.
You can take the line off and take to a parts store that sells metal brake pipes by the foot,there is different size pipes as well as flared end nuts.You will have to bend the pipe to fit then bleed the brake system.Iwould suggest to take it to a shop and have a pipe made up.
as an owner of three gmc sierras, i can attest that the brake lines that run along the frame rail under the master cylinder inherently rust away and break. I wouldnt neccesarily think it was tampered with. but do check the condition of all of the lines including the fuel lines for excessive rust.
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