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HELP - no power at the rear wheels 2015 Sierra 1500

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On 9/13/2021 at 3:11 PM, swathdiver said:

You can buy your own GM software online, the MDI with GDS software, hook it up to a laptop and diagnose and test it yourself.  You would use this tool in conjunction with the shop manual, which you can subscribe to at AllDataDIY for a nominal fee.  It will pay for itself just for this issue.


oh wow I had no idea ... I'll have to look closer at laptop requirements and I assume an ODB port -to- USB ... thanks!

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