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Need some help!!! Bleeding brakes on 96 GMC Pickup

J

JD Seller

Well-known Member
I have a 1996 GMC half ton 4x4 pickup. The rear brake lines rusted through. I have replaced the lines and have the bleeders loose. I can not get them to bleed. The ABS did not activate while the brakes were leaking. I do not have an ABS light on. Usually you can get these systems to bleed by slow pumping them. One pump wait 10 seconds and pump again. I am not having any luck on this one. Brakes where fine until line blew.
 
You need to loosen the front bleeders, hit the pedal, and hope the centering valve stops before it resets to the front. I fought my 96 for two hours till I found the parking brake was on one click,after I released the brake and the light went out(same bulb)
 
Can't say it's the same thing I went through on this [b:894e6a3969]2002[/b:894e6a3969], but it sounds familiar.
I would second the vacuum pump. Mine is a simple hand held one with a gauge.
 
Thanks Royce and Wildcat: I have a vacuum bleeder. I rarely use it on vehicles. I mainly bought it for JD 2950/2955 tractors. So I will have to dig it out and try it.
 
I've had trouble with a couple of them even bleeding with the Tech 2, One I took for a road test and turned around in my normal place, parking lot happened to have ice on it, slammed on the brakes hard cause I was Pizzed, let the ABS growl until it quit sliding and I had brakes. Did it again and parked it in the done row. I've done it on loose gravel too and it jars something loose in that abs module.
 
We had one we couldn't get the air out of. Took it for a drive and did a couple panic stops. The panic stop moved the air around and we were able to get the rest of the air out.
 
Might have to take the bleeders out, and run a drill bit through the hole and clean out the rust and crud. Especially the two at the cyl end, that is unless you're getting fluid through them already.
 
This is correct . Open all 4 bleeders, hit the pedal hard to the floor, close all bleeders and start the normal bleeding process over.
 
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