98 cavalier abs sensors on back tires. need to take off to see if they need cleaned. can't see how?

Well, when the light is on it means the traction control is off or not working. And yes an ABS wheel sensor could be involved, but I doubt a wheel sensor would cause the symptoms. The jolting part sounds like the transmission is going into neutral for a few seconds.
You should be able to have the abs checked for trouble codes.

First thing you need to do is get the trouble codes from the computer and go from there.It could be just a wheel speed sensor that is faulty.

after replacing breaks and rotor did you bleed the breaks?

think it may be an earth problem on the back of the dash on the printed circuit like the earth

there are located at the center of hub in the rear, and the front is also near center onthe side of were the axle goes into the hub, good luck.

Get the ABS sensors on the tires looked at.

ok the abs light is on then it need to be service by a computer. take the car to the shop so they can put it on the computer. only the computer can fix and set the dios for this. if you are not having any problems and just the light comes on take the bulb out . it's not a problem. most cars have a few light on like service engine, check oil and so on. if you hate seeing these lights and you know you don't have a problem take out the bulbs

When you replaced the ABS sensor on the hub, did you clean and re-gap the sensor to the speed ring on the hub. There was a recall on the ABS Malfunction on your truck. The tire size don't make a difference to your ABS as long as all four tires are the size, There was a issue bulletin with your Tahoe on the ABS activating under 8 km/h. Good luck and hope this helps, if not clean out the sensor with brake parts cleaner and check the wire harness and ABS sensor bracket. Re gap the sensor to the speed ring hub. Here is the bulletin. Anti lock Brake (ABS) Activation at Low Speeds (Clean Wheel Speed Sensor Mounting Surface) #03-05-25-007C - (05/16/2006) 2001-2006 Chevrolet Suburban, Tahoe, Silverado

The problem could be youe sensors are wet and they freeze. This will cause the light to come on. Common problem.

ABS is near the breaks when you take the tire off and the break pads you will see it it is very small part that is a sensor. mine went on my car when the guys were putting my breaks on it it really has not made to much of a difference in the breaks. they are costly so I just deal with the ABS light for now til summer