I PURCHASED A 2003 TRAILBLAZER FROM AN INDIVIDUAL. THE FRONT DIFFERENTIAL HAD A HOLE IN IT. SO I PURCHASED A DIFFERENTIAL FROM A SCRAP YARD. 90 DAY WARRANTY. STILL HAD A NOISE . I STILL HAD A NOISE FRONT DIFFERENTIAL WAS OUT AGAIN. I PURCHASED THE THIRD DIFFERENTIAL FROM A DIFFERENT YARD TOOK IT APART . FOUND THE DRIVER SIDE BEARING BAD. IT SEEMS TO BE A VERY COMMON PROBLEM BECAUSE THE DRIVER SIDE DRIVERS CONSTANT. I WAS WONDERING IF THERE IS A RECALL. I SEE A LOT OF COMPLAINTS ONLINE. THANK YOU THERE WAS A FIRE THE DIFFERENTIAL GREASE BURNT BEARING WENT OUT AND CHARD MOTOR AND SURROUNDING AREA NO REAL DAMAGE. *TR