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Q:

Why wont it switch to 4x4? on 2004 Chevrolet Silverado 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Service 4x4 light is on, the switch has been replaced & the 4x4 still doesnt work.
(1) Answer
Have the system scanned for trouble codes at a repair shop, not parts place!