GMC Troubleshooting Questions? Ask a Mechanic for Answers
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The E brake cables could be frayed or frozen up or rusted, Here is something you can try, with the vehicle in Park, pull the emergency brake handle, to where it SHOULD be released, and maybe even put something under the handle holding it in the RELEASED position . Then at the back where the emergency brake cable goes into the backing plates at the wheels, grab that Emergency brake cable sheath and pull it and bend it slightly opposite the direction it is bent in, my thoughts are it's rusted or frozen in place. You may want to trace the cable from the backing plates and bend and move it towards the interior. If you see a spot the cable comes out of the sheath at, and if you can, grab it with some needle nose pliers and try to force it back towards the backing plates and loosen it as it pulls towards the interior and releases tension back towards the backing plates. See if that helps. also, anywhere you see the cable going into the sheath at, spray some PB blaster or WD 40 into the sheath of the cable.
Hello, Did you have any luck with that? Was this something you were going to try and fix yourself? or did you want possible causes and solutions and estimates of what it might take to fix it? thank you.