my dash looks like a christmas tree my service brake system msg and abs light and E brake light are all on and we put it on a scan tool and there was no sign of life in the abs module i checked the fuse under the hood and dont want to spen 350+ on a new one if thats not the problem has this happens to anyone else here who can help me?
2004 chevy silverado 5.3 4wheel disk brakes 2wd ecsb

 

Hope you get it resolved.
My ABS makes me feel like im on a washboarded road when I hit it (no matter how hard/soft). Replaced rotors and pads, and still no help...I think my motor is going out.

 

black04silverado, your problem sounds like a bad ABS pump or a bad transmission speed sensor. Did the truck throw any codes?

Modern_Muscle, sounds to me like you have a bad wheel speed sensor causing a constant unnecessary ABS activation. Check each sensor for fraid/loose/corroded wiring.....after that you will have to replace them.

 

Yea, sounds like Modern_Muscle's problem is speed sensor related. My buddy had a similar problem in his 03 HD, and I had him remove and clean the front speed sensors and it cured his constant ABS activation.

black04silverado, you need to get the right kind of scan tool on there to retrieve ABS codes, a generic OBDII scanner won't do it. Something like a TechII or other capable scan tool is necessary.

If you had the right scan tool and still didn't get any codes, the ABS module may be faulty. There's a guy at modulemaster.com (google it, I'm not 100% sure of the address), who repairs the ABS modules for around $100...if that's your issue.

 

ok more news on it my guages died for a second and came back and i turnd off my dash lights and my driver window switch the light came on by them self and then went back off idk whats going on and no codes just the abs light and service brake system msg its going in the shop monday i was just trying to save some money and fix it myself

 

There's a ground that's common to corossion, I believe it's on the driver's side frame rail or something...hopefully someone will chime in with the exact location. If lights are coming on by themselves though, I'd think that a short or water in a junction block or in a connector would be something I'd be trying to troubleshoot.

 

could someone tell me where this grout hes talking about is??