"13430 - CUSTOMER SATISFACTION. CERTAIN VEHICLES, EQUIPPED WITH A 3.73 REAR AXLE RATIO (GT4) AND LOCKING REAR DIFFERENTIAL (G80), MAY HAVE A REAR AXLE PINION NUT THAT IS IMPROPERLY FASTENED. THIS COULD CAUSE A GEAR WHINE, CLICKING, GRINDING, OR A MOAN NOISE FROM THE REAR AXLE. DEALERS ARE TO REFASTEN THE PINION NUT."
