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1999 GMC Jimmy

Deep grinding noise passenger side front… is it a wheel bearing?..or cv…how to tell the difference…(diagnosis techniques)

4 wheel drive ?

Worn CV-joints normally release a clicking type noise. (easily heard when turning sharply and slowly)

To check for a possible wheel bearing fault, jack up the vehicle up so the wheel clears the ground and grasp the tire at the 12 and 6 o’clock positions and try to rock the wheel. Do the same at the 3 and 9 o’clock positions.

A loose/worn wheel bearing will allow the wheel to move in at least one of those directions.

Block the rear wheels (both directions) and although it isn’t imperative to, you can also position a jack stand under the frame for extra safety.

You can also listen for any excessive grinding noise when rotating the wheel while applying side pressure.

The thing with this is don’t confuse the normal scratching sound you hear from the brake and rotor.