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New brake line set

New brake line set

Postby Grunt66 [OP] » May 12 2020, 4:13pm

I have a "01 Silverado 1500 LS with the 4.8 and I replaced my old and rusted brake lines with a new stainless steel set. I am now having trouble bleeding the brakes. I can't get the air out of the lines. No matter how much I pump the brakes. I even went out and bought one of those brake bleeders that forces the air out. I start with the passenger rear caliper and open the bleeder and I never get any fluid to come out. I am no expert, but I've done enough brakes to know how to do them. Please, can somebody tell me what I am missing here? I also have an ABS module under the driver seat on the outside of the truck. Any help would be greatly appreciated.
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Re: New brake line set

Postby nealinator » May 12 2020, 4:16pm

Have you tried removing the bleeder screw all the way out to see if maybe it is plugged up?
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Re: New brake line set

Postby Grunt66 [OP] » May 12 2020, 4:24pm

Yes, I even replaced both back and front passenger brake calipers.
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Re: New brake line set

Postby silentbravo » May 12 2020, 4:27pm

So the fluid level in your reservoir isn't going down at all when you pump and have bleeder open? Have you tried opening the other bleeders to see if fluid moves through any lines?
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Re: New brake line set

Postby 19trax95 » May 12 2020, 5:30pm

Get a new cap for the master and make a pressure bleeder. You can use a bike pump and add a valve stem to add air to the master. Dont need much pressure. Open the bleeders one at a time and put a little pressure to it and see if it will work the fluid through the lines.

Either way you'll need a scantool to run a abs bleed. Otherwise your pedal will never firm up nicely.
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Re: New brake line set

Postby Grunt66 [OP] » May 12 2020, 7:21pm

The fluid isn't going down at all. I used an Autel Maxicheck pro and it didn't have the "VIN" number when it comes to the ABS. So, I couldn't get access to the ABS module. I tried using the pressure bleeder on it and that didn't even work.
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Re: New brake line set

Postby 19trax95 » May 12 2020, 7:39pm

How does the pedal feel? Does it feel like it's doing anything, or just air?
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Re: New brake line set

Postby TennMan » May 12 2020, 8:26pm

Grunt66 wrote:The fluid isn't going down at all. I used an Autel Maxicheck pro and it didn't have the "VIN" number when it comes to the ABS. So, I couldn't get access to the ABS module. I tried using the pressure bleeder on it and that didn't even work.
I've not tried this but without access to a scanner that will do the ABS bleed you might want to give it a shot.

Jack up the truck. Connect your pressure bleeder to the master cylinder. Start the engine and put the transmission in drive to get the rear wheels turning. Then hit the brake pedal and hold it down. Without the front wheels turning the ABS should activate allowing any air trapped to be purged from the ABS unit. Turn the engine off and try to bleed air from the system as you normally would with your pressure bleeder. You might have to do this several times to get the air out.

Again, I haven't done this myself but I've read about other people doing it and it helped with getting the air out without a scanner.
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