Q: 4wd problem on 2007 GMC Canyon

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
The button of the 2 hi flashes sometimes
(2) Answers
Have the transfer case module scanned with a professional scanner to find the trouble. Is the 4x4 working?
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It needs to be scanned by somebody with a Tech2 scanner to read the transfer case module and find the fault.
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