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Posted (edited)

It’s a 2018 Silverado 1500 with only 40k miles. Felt like it was a little strange to get these codes so early in the trucks life. Maybe I’m wrong, not sure. Thanks for any advice! The problems started after I did a 3in leveling kit and flowmaster cat-back. Also, right before the codes appeared, I had taken the truck to upstate NY and was driving in rainy/muddy conditions and up and down a long gravel driveway. Thank you again.

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Edited by Frankdep

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