Hello everyone, let me start by saying I am new to this forum and I am enjoying it very much. There is so much knowledge to read and learn!

I went to my dealer for the 30,000 scheduled maintenance on my 2007 Chevy Malibu LS and along with other services, they rotated my tires. No bad sounds appeared until the next day when I began hearing a high pitch sound coming from the FRONT LEFT part of my vehicle/tire when I accelerated and as well as when I slowed down.

I got new brakes 2 months ago and no sounds were heard all this time until after the 30,000 scheduled maintenance. They did put regular oil instead of synthetic (had to leave and forgot to tell them). The sound disappears mostly after a bit of driving, probably 10-15minutes and it stays off for the rest of the day. Sometimes the sound returns though but very soft. I park my car and accelerate to see if it is the engine but no high pitch sounds appears.

It seems the sound is only when my tire is in motion. If I go fast or slow, the high pitch is constant so it doesn't get louder or softer depending on my speed, it just sounds faster or slower. Maybe the tire rotation caused this? Wrong Oil? Maybe the part that is causing the sound needs some grease? What part might that be too?

The sound is coming from the Front Left part of my vehicle/tire. I assume it is the tire/wheel area since the sound is from there and also when the vehicle is moving. If not then I am not sure what else it could be.

I took it to my 2nd mechanic and he removed the front left tire to see if he finds the cause of this high pitch but he did not find anything. I'm regretting a bit taking my car for that scheduled maintenance but I guess I just felt it was going to be a good thing (I know it was but still :) )

Any help would be greatly appreciated. Thanks!

Are you sure it isn't the tires? Sometimes when you rotate the tires since the tread wear is different it can cause issues.

You'll need a left-hand-spiral tapered flute reamer and 14.7 ounces of headlight fluid.

Joking aside, Silver has a point. How worn are the tires, and did the front left come from the right side? Usually, modern radial tires don't suffer from rotation left-to-right like the early ones did (1970's era). But that doesn't mean that one tire isn't having a bad day.

Check for the obvious, that's if your mechanic friend didn't. Look for the wheel well liner to be contacting moving parts. Also look for tools that were left where they shouldn't have been, or fasteners and/or old parts that may have fallen and not been recovered during your service.

Since it happens only when the wheel is turning can you have your mechanic friend help you lift it and support it safely while it is put in gear? Then you could listen for the noise and wouldn't have to try to run alongside it at 50 mph!

I'm with Silver on this. If the tire moves laterally (defective tire or rim), it will alternately push and pull on the hub. This will make a kind of oscillating, warbling noise. Try switching the tires from left to right.

I'm with Silver on this. If the tire moves laterally (defective tire or rim), it will alternately push and pull on the hub. This will make a kind of oscillating, warbling noise. Try switching the tires from left to right.

When I had mine rotated they swapped sides too. It made noise and gave me some vibrations. I changed them front to back, not swapping sides and it was fine. FWD cars use alot of front tire and swapping sides can give you some issues. Most places when they rotate will also swap sides like an X pattern. With many tires/cars this can cause issues....