1997 GMC 6500 Brake Issue's - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 06-12-2019, 02:03 PM   #1 (permalink)
57ChevRay
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1997 GMC 6500 Brake Issue's

I have a GMC C-6500 with Hydro Brakes 1997. Three of the brakes are dragging. Has anyone had any experience with working on these Brakes that can help? It has ABS and I replaced one of the Clippers but its still dragging the brakes. Everything seem to look good no leaks brake paddle pushes in fine. I'm wondering if its just the Master cylinder. Also where is a good place to buy these parts from as I don't really want to buy cheap parts then have to buy them again.


Thanks
Ray

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Old 06-12-2019, 02:45 PM   #2 (permalink)
Mikey52
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I remember reading on another forum, but canít remember which. That there is a part, not sure if master cylinder or hydro booster that could plug up. And cause dragging brakes. There was even a procedure to test it by applying brakes the moving something under hood to see if they released.

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Old 07-14-2019, 07:01 PM   #3 (permalink)
1957z28
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Several Manufacturers make a brake pressure gauge.
Screw into the bleed screw hole and drive it... It should go almost back to zero
Brake hoses also can collapse not allowing the fluid to return..
Best 40 bucks you can invest...
I purchased a wilwood gauge to get my brake pressure up on the race car
(changed the peddle rod ratio )
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Old 07-16-2019, 06:49 PM   #4 (permalink)
57ChevRay
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I have found one of the issue's the caliper just won't floating. So now they are not sticking. But I'm not ready to test drive yet just not done. I have an ABS light on I hope that won't give me problems.
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