Every time my speedometer reaches 70 mph on my 2000 S-10 the ABS light comes on and stays on until I turn the engin off. I've have the breaks checked twice and they are good. Any ideas?
The speed sensors in the wheel hub control the abs each wheel bearing/hub has a speed sensor you need a good scan tool to pin piont the bad one or ones with gm you have to replace the whole hub/bearing to replace the sensor.
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Test your wheel speed sensors. You can do it with a DVOM or a hand held lab scope. With a DVOM you want 2.8VAC while spinning the wheel and with a lab scope you want a good sine wave pattern.
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it's too early to tell. i,ve never known a light to come on because of a thermostat.you need to see what code was stored. without knowing,im just guessing. but my first thought was a plugged up catalytic converter. that explains the low power,also fuel filter.
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Have you had to add oil? The fact that it comes on going up hill would suggest it's the oil level.
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There was a recent class action law suit settled with GM for this exact problem. You can google gm speedometer lawsuit and get lots of information. Unforutunately for most people I think the warranty was limited to 7 years and 70,000 miles. Which isn't a lot of miles for most people.
If you car isn't covered by the warranty there is a way to "reset" the speedometer.
You can turn the ignition slowly like you are going to start the engine. There is a very small "dead" space where you will see your guage lights go off.
What you want to do is cycle the ignition switch from off to that dead space. Each time you do it your stuck speedometer will move towards zero about 10 mph. So if its stuck on 40 you will have to cycle it at least 4 times.
At first you will probably actually hit the ignition and the engine will try to start.....just release it and try it again.
I know this because I have a 04 avalanche with 80,0000 miles and it has this problem about twice a month.
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There are many pieces involved with this error. You need to pull the codes from the computer to know for sure.
There is a sensor, typically under the rad support, from bottom of vehicle, this component suffers road salt and moisture damage.... check it carefully and if corroded, replace the wiring harness stub also, so everything at the connection is new.
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