Check the GM recall list on this vehicle. There are problems with the multifunction switch, and the hazard light switch. The recall actually shows you what to do to narrow down the problem. Brake lights run through both of these switches. I just went through all of this, ended up being a burnt female connector that goes into the brake light switch. Up on the brake pedal.
SOURCE: 2005 CHEVY +TRAIL BLAZER ABS AND BRAKE LIGHTS ON
When the ABS light is on when driving there is a problem in the anti lock brake system and you will need to have it tested to find out what the problem is. As long as the light is on the ABS has been shut off by the computer until it is repaired. There could be problems with one of the wheel speed sensors, wiring or the ABS pump. On some vehicles the red brake light will come on too.
SOURCE: 2001 chevy s10 blazer abs light stays .
The abs is a add on for the brakes that when the tires come into a skid or slid they wont lock up..Your brakes will still work great with the abs disabled but your brakes will lock up if you push on the brakes hard enough to stop.Mainly abs works in slippery conditions not letting the tires lock up and keep the car rolling instead of making it slide..But no effect of the brakes will happen..Just make sure your fluid is full and there are no leaks and if you want to get them check you can stop by your local Auto Zone and they will scan your car for free and tell you what sensor is bad..I hope this was helpful to you...Have a great night
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SOURCE: vacuum hose diagram for a 2001 Chevy Blazer
look on google i can fing everything there if you want email me with your emailaddres i will try to find it for you
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