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Q:

i replace my 4wd module on 2004 Chevrolet Silverado 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I can't get it to work
(1) Answer
BEFORE you replaced the module , did you perform any tests to make sure it is/was getting the proper control signal?