Question about 1993 GMC Suburban
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Posted on Jan 02, 2017
SOURCE: bleeding rear drum brakes
Take a small drill bit and clean out the center hole of both bleed screws (make sure you get all the way down into the hole, but don't go into the metal at the end.) Then, spray a good solvent into holes and on threads. Give some time for the solvent to soak in.
Put a six point box wrench on the bleeder then tap on the end of bleeder with a hammer. Keep doing this till it comes loose when turning the wrench. Don't use excessive force but don't be afraid to use enough force to get it to turn. Doing this, you will crush the tip of the bleeder, but that will not harm the "business end" Don't use vise grips on bleeders. At best you will damage flanks of nut portion, at worse, you will snap them off. Once you have removed bleeder, clean all rust off, make sure passageway is clear and re-install. If you do manage to break a bleeder, they can be drilled out, but it must be done carefully...if you damage threads or end seat it's officially junk. Bleeder screws are usually available at most parts stores...and, wheel cylinders are not very expensive if you need to replace one. Hope this helps!
Posted on Mar 25, 2009
if rear wheel drive the combination valve has be held open.you have to have a combination valve depressor tool .you need a scanner to do abs brake functional test.
Posted on Apr 27, 2009
check your calipers to make sure the bleeder is on the top! If not it will create a pocket of air in the chamber that won't bleed out!
Posted on Aug 31, 2009
Vlv problems within the tranny. Try flushing tranny and changing filter. Other wise it may need be gone through.
Posted on Oct 10, 2009
Testimonial: "We are trying to see what we can do with out having to rip out the tranny. This may be helpful as we look at our options."
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