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ABS and Brake light on. What does it mean?

slick75
0

Asked by slick75 Feb 08, 2010 at 02:26 PM about the 2001 GMC Sierra 1500 SL Standard Cab LB

Question type: Maintenance & Repair

My abs light and my brake light is on, I heard this is a pretty common issue with these trucks. What
are some recommendations on a starting point for troubleshooting.

10 Answers

Matthew Huttema
185

I have the same thing on my truck. what year is yours? i got it checked out at the shop and they said that i would have to replace the abs computor which is about $2500 CDN

17 out of 17 people think this is helpful.
Sam Salameh
100

i had that same problem and all my car need was break fluid .. i guess thats the cars way of telling u you need break fluid !! hope it helps

10 out of 10 people think this is helpful.
97drexelgrad
205

In many cars and trucks, the abs sensor is built into the wheel bearings of each wheel. These thin wires can become corroded and break, especially if you live in the Northern states where road salt is a plenty in the winter. As the previous reply stated- check the fluid first. If all is good, you could contact a GM dealership and have them scan your system with a Tech2 scanner. That would be able to tell you exactly what wheel is causing the trouble and DTC. ( diagnostic trouble code). Or you could pull each wheel, disconnect the bearing harness, hook up a continuity tester to the two leads and spin the bearing. If the meter changes its reading, then that bearing is good. If it stays at 0, then the wire internally is broken, causing an open circuit, therefore causiung the ABS/brake light to illuminate. Good Luck

17 out of 17 people think this is helpful.
Glenn Clingenpeel
600

Mine sometimes comes on when I start the truck, and sometimes when I am moving at constant speeds. Sometimes, it can be a month or more, before seeing the light come on. I have read the wheel sensors may be dirty. How does one clean them? Does the wheel hub, or wheel sensor need to be diassembled, in order to clean it?

60 out of 60 people think this is helpful.
Josepi Locascio
125

what happen to mine was it came on and off and i hooked up the scanner and it said the speed sensor so i changed the wheel bearing and it fixed the problem

6 out of 6 people think this is helpful.
KevDizz
350

Im having a problem on my 2004 sierra where my abs light comes on when i hit bumps in the road. but then it will go away either on its own or when i turn the truck off and back on. this all started happening after i got my tires aligned. ive already replaced the front two wheel bearings this year as well

35 out of 35 people think this is helpful.
Loztcauze
40

KevDizz, that's the same thing that's happening to me except I never had the tires aligned. I replaced the sensor that the code came up for and still comes on and goes off when it wants to.

4 out of 4 people think this is helpful.
Jeremy Lancaster
0

Or could mean u need to change your brakes

Obey Cool
70

I have a question abs because it pop up my dashboard and I am driving a GMC ENVOY THE ON MY TRUCK IS A 2000 WHAT SHOULD I DO

7 out of 7 people think this is helpful.
2004Sierra
10

I have a 2004 GMC Sierra Truck. The transfer case will not engage into four wheel drive. I took it to a GMC dealer and they are saying that is internal, but can not diagnois it until it is taken apart. Anyone have any suggestions?

1 out of 1 people think this is helpful.

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