I will say, I installed the NAPA thermostat last week. It said 190, but it most definitely sits at 200. On the stock, running on the interstate I would sit at 187-190, but have massive temperature fluctuations at say a red light. Sometimes jumping to 220+.
The salt on the road is just horrible. Had to replace the rocker panels on my dads 2010 3500 last year. We don't even live up north, just visit family there once a year for Christmas.
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