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Q: what is the most likely problem when service 4wd light is on randomly on 2006 Chevrolet Silverado 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Service 4wd message Diagnostic code CO327 and CO379
(1) Answer
transfer case may need to be serviced. possible dirty connection. bring to a tranny shop and have them run a diagnostic(more thorough). tranny tech. advise.