Chevrolet Avalanche 1500 transfer case pinhole leak due to common pump issue requiring rear housing replacement on Chevrolet Avalanche 1500

Some Chevrolet Avalanche 1500 owners report experiencing transfer case pinhole leaks attributed to common pump issues that require rear housing replacement. Mechanics have identified that these leaks often originate from a hole worn into the housing near the pump/bearing, typically located on the passenger side of the rear half. To resolve this issue, many owners find that replacing the rear half of the transfer case housing and using a pump rub fix kit can effectively prevent future leaks. Additionally, regular maintenance and inspection of the transfer case are crucial for identifying potential problems, such as low fluid levels or worn-out components, before they escalate. Being proactive about these maintenance checks can help mitigate repair costs associated with transfer case issues.