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Brandon Clounch

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About Brandon Clounch

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  1. I just purchased a 2020 GMC Sierra last weekend and had several issues with misfires and KR with less than 3000 miles on the truck. Wondering if there were some quality control issues at the plant as I've seen some other posts on various boards. Attached is a data log showing what is going on. I have some serious KR and misfires on Cyl 8 during cruise. Took it in last week for P0300 and they did a cam relearn. Its back at the dealership this morning with the same issues. Not sure what normal vacuum is for these trucks, but mine does seem to be very low at cruise and idle. Data Log.xlsx
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