Chevrolet Avalanche 1500 PASSlock prevents starting, requires key relearning each time on Chevrolet Avalanche 1500

Some Chevrolet Avalanche 1500 owners report experiencing issues with the PASSlock anti-theft system, which can lead to repeated key relearning requirements and prevent the vehicle from starting. This system, known for a higher failure rate, may cause significant inconvenience and safety hazards if it malfunctions. Owners have noted that if their key lacks a chip, it is likely part of the PassLock system, which is prone to issues. Some have found temporary solutions, such as placing a resistor between the passlock sensing wire and the ground reference wire, or leaving the key in the ignition at the "auxiliary" position until the security light shuts off. However, it is crucial to address the root cause of these problems to ensure the PASSlock system functions correctly.