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Matt
Matt, Engineer
Category: Chevy
Satisfied Customers: 20605
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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06 avalanche, just replaced pads in the rear and now have a

Customer Question

06 avalanche, just replaced pads in the rear and now have a service brake system message and stability system disabled measagr
JA: How old are the rotors? How many miles are on the car?
Customer: Rotors had about 10% wear and were turned, 110k on the truck
JA: Are you fixing your Avalanche yourself? What have you tried so far?
Customer: Yes, check fluid levels, checked for leaks, and code scanned with no codes showing
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 10 days ago.
Category: Chevy
Expert:  Matt replied 10 days ago.

Hello

I'd say that ther may be an issue with the rear wheel speed sensors that may have been damaged or disconnected during th e rear rotor change

So I'd begin by checking the sensors
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The sensor is located in the wheel hub so you'll have to remove each wheel in turn to inspect them all.

Also check that the toothed wheel that the sensor points to is clean and free of any debris.

you can check each sensor's function by plugging the two output wires into an AC voltmeter and spinning the wheel quite quickly, you should get a voltage signal that increases with rev's.

Its possible that the fault is only a bad connection to one of the wheel sensors.

This may be remedied by removing each wheel in turn and unplugging each sensor and cleaning the contacts with a squirt of electrical contact cleaner. Then refitting.

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