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Just got back from the dealer for a 90K service on my 07 Tahoe. I asked them to check into a noise that I've heard for quite some time, probably since I've purchased the vehicle, it sounds like brake pad and rotor constantly rubbing even when I dont have the brake pedal depressed. I hear it when the car is coasting at about 25-30 mph, suspected wheel bearings. Asked them to look into it, and they said the front left bearings are the cause of the noise, so they replaced it under warranty, he found out that the wheel bearings fall under the 100K drivetrain warranty. (not sure if this is right, but hey I'm not complaining saved me supposedly $500). So as I'm driving home, I listen for the noise and I still hear it but its not as noticeable, so now I'm not sure if it's wheel bearings to begin with. But the service advisor said the tech check all 4 and listened with a stethescope and only said the front left needed to be replaced.
Has anyone had this issue I'm having or can give me some insight on wheel bearing issues or signs of bad bearings? Thanks.
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Yes I have put a lot of road time on it. hehe! Its a pre-07 model, so I've had it since Apr. of 2006. Had a few problems that were troublesome, and still have issues.
That isn't the sound you generally get from a bad wheel bearing. The pads on GM and a lot of other brands for that matter hang up in th stainless hardware in the caliper bracket. I usually have too drive the pads out with a hammer. Most commonly the outer pad hangs and the inner ones wear out way before the outers. Take a look at this to see what I mean http://jimscampingforums.com/forums/...p?topic=1682.0
Here is a possible source for your noise, The rotors rust, as they do they build up a layer of rust around the circumference. That rust can scrape against the caliper hardware. I had it happen on the back rotors on my truck this summer. JUst take a hammer and chip it all off.
A wheel bearing usually sounds like a growl or rumble and the sound changes as you load and unload the bearing by turning left and right while going down the highway. Think slalom course. By them changing one of the bearings they had to take the brakes apart and they MAY have removed some rust in the process or freed up a sticking pad.
Bob
replaced front right wheel bearing
