They did the service at 30000 miles on my truck. The engine head 51% carbon buildup they flush that. I took it home engine light came on took it back. Catalytic converter went out they were going to have to replace it. It would take about a week so I bought a new 2019 Z71 Lt Trail Boss and that's the one I'm driving now. Their service was great or I wouldn't have bought another truck from them.
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