towing temp
i have a 2002 gmc serria 2500hd and just got 35 FT COUGAR FIFTH WHEEL AND NOTICED ON SOME HUGE HILLS THE TEMP GOT TO 221 IS THIS OK IT CAME RIGHT BACK DOWN AFTER HILL??
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That's completely normal and acceptable engine temp. I'm pretty sure your t-stat is a 210 so your only 11* above that.
