Rear differential repair cost

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Sounds like your Buick's rear differential is throwing a winter tantrum. When the left rear wheel locks up in sub-zero temps, it could be a sign of moisture in the differential fluid freezing up or a mechanical issue like a failing bearing or gear. The ABS and traction control lights are like your car's way of saying, "Hey, something's not right back here!" It could also be too much water content in the brake fluid causing it to freeze or a caliper being stubborn and not releasing. That being said, none of this frozen stuff is cool. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.