Had brakes and rotors and master cylender changed on my 2000 tahoe abs light was still on had very minor accident now abs light went off but abs computer is kicking on for no reason

You need new rotors

• One or more of your ABS sensors has more than likely gone out. ABS is Automatic Braking System. This is an auto pumping of your breaks as a way to prevent skidding. The TCS (Traction Control System) light is going off because of the ABS. One is making the other react.

• So there are a few diagnosing things you can do first before just throwing in a part. To find out exactly which ABS is malfunctioning you can take your vehicle to Auto Zone and get it scanned free of charge.

• Check for abnormal brake dust buildup on the rotors. Check the master Cylender and the EBTCM - Electronic Brake Traction Control Module on the master brake cylender for broken connectors and wires. Make sure all the brake lights are working properly and that no water is sitting in the brake light assembly.

• As mentioned above if all this checks out then you need to get it scanned to find out the ABS sensor that has failed. If you pull the wheel and look on top of the rotor towards the back you can see the ABS sensor. They are an easy replace. They literally twist out and remove the connector and then replace with a new one. so don't spend big bucks on a replacement you can do this yourself.

• Hope this helps and thank you for using FixYa.

Regards, Tony

keep bleeding and bleed the front as well the littlest amount of air will keep pedal spongy if the abs came on after doning brakes check the abs lines and connections up front the abs lines sometimes get banged up will doing brake job the abs sensor is the wire that runs from behind the rotor to the fire wall sometimes they get hit knocked into or damaged if wiring looks good have vehicle scanned for code .the code will make it easier to pinpoint what side-- if circuit problem--or if sensor went bad most auto stores offer scanning for free

you may need to bench bleed your master cylinder to keep the air from filling the lines and making bleeding more difficult

here is a link to a "how to"...good luck (I hate brakes)

this problem is going to be your front rotors being warped. either have them machined or replaced.

Try having the dealer flush and bleed your system. It is very hard to bleed ABS systems yourself and have safe brakes that still work afterward. Bleeding non-ABS brakes yourself is easy not the same for ABS brakes. Valving, sensors and what-not require a tech and the correct equipment in my opinion. You do it wrong and you could ruin your ABS system. Do that and see if they firm up. I replaced my brake shoes/pads at the same time all new everything in back, drums/springs everything and new rotors up front. then I had the chevy dealer flush, refill and bleed system. Stiffer pedal and brakes work better. Keep in mind the brakes on 99 Tahoes are inaedequate, require new rotors often, heat up and fade/glaze pads regularly. I replace my pads long before they wear down because they glaze up and start fading early. I'll rough em up once maybe, next time, new ones. Every two brake jobs, new rotors for me. Just how it is. They will stiffen a bit and work better but they will never be awesome brakes. Just how it is on 99 and earlier Tahoes. Hope it helps. Very important to bleed correctly though. I'll bleed my 83 Toyota 4x4 myself but not the Tahoe.

check the wiring of the master cylendor check pads ,shoes, disks(rotors)

This means...something needs to be attended to in your braking system! I'm sorry to be harsh, but the light comes on.....FOR A REASON! Have your brakes looked at, by a professional ASAP!....before you have a life changing accident.

Sounds like need new Calipers for front too. Maybe a new master cylinder may be need too. Sound like to Calipers or master cylinder are now letting to brake fluid go back to the master cylinder.

the brake light switch. under dash behind brake peddle arm.