bleeding abs system

[tdc_v6]

To make it shor, I am having problems with my brakes and i was told to bleed my abs system. Does anyone know how to and the order to do it in..

[Dominic]

First bleed all 4 brakes... you always want to bleed the longest tube first (rear right passenger) and work your way back.

If that doesn't work for you and you *really* need to bleed the ABS then let me know... hopefully this is not the case.

[tdc_v6]

Yeah i know how to bleed the brakes properly. Start with farthest from the brake fluid pool and make your way to the closest. I have done that probably 9 or 9 times but when i asked the guy at NAPA he said my abs would have to be bled. So if you could help me i would rally appreciate it.

[JAM]

I never heard of "bleeding the abs" What is that? I always bled mine many many times and had no problems.

[awesomeame]

yeh, what is this "bleeding the abs" business??

--matt

[V6Bob]

The ABS system has a "modulator" (the thing that pumps the brakes if they lock up) which may need to be bled. Unfortunately, it's a job for a pro with special equipment.

[ December 30, 2003: Message edited by: V6Bob ]</p>

[awesomeame]

what is this "special equipment" of which you speak?

--matt

[Denis]

My 2002 service manual has a section on "ABS Automated Bleed Procedure". First you have to hook up a scan tool and connect to the Electronic Brake Control Module (EBCM). From there you go to Special Functions and then Automated Bleed. After bleeding the base brake system you follow the instructions on the scan tool.

[ December 30, 2003: Message edited by: Denis ]</p>

[slow]

you need a tech II, about a $2500 tool that technichians use.

There are a few ghetto methods on ls1.com and ls1tech.com that might work.

But personally.. its just nice to know somebody with a tech II

Ryan

[CamaroRob97]

YOu can do it without the tool, ive done it.
There is 2 bleeder screws on the ABS pump istelf. Your supposed to do those 2 first then the 4 wheels.

[viper98885]

I have the GM Shop manual instructions for bleeding the modulator here. I will scan and repost.

[viper98885]

ABS Brake Hydraulic Modulator Bleeding Instructions

This is an Adobe Acrobat file.

[awesomeame]

cool! thanks a lot viper!! so you can do it without the tech 2 [img]smile.gif[/img]

thanks for the info! that should be in the tech database ;)

--matt