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Discussion Starter · #1 ·
Hi I have a 1990 k1500 and when I hit the brake the from will lock up and the rear do nothing and it blew a rear brake line so I replaced them all (since it is 30years old and all the lines looked pretty bad) and that didnt fix my problem so I replaced the master cylinder ,deleted the abs (because some forums said it caused squishy brake pedal) new proportioning valve , and that still didnt fix it so I rebuilt the rear drums and still same thing someone please help me.
 
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