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My New 2019 GMC AT4
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07-25-2020, 05:52 PM
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LS short box
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Join Date: Jun 2015
Location: Carlos MN
Posts: 2,064
Re: My New 2019 GMC AT4
Just bought a 2020 Silverado 1500 with the 6.2.
Question? When you deleted the muffler did you delete the two butterfly valves that are in front and behind the muffler?
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