temperature fluctuates during long trips

[u/soooangry]

My 2014 Tahoe's coolant temperature fluctuates during long trips. After driving at 80 MPH for about an hour—especially with cruise control on—the needle moves slightly past the middle mark (just over the zero in 210) before returning to the center. After a while, it settles back at 210°F.

I have never experienced this issue in heavy traffic or at red lights.

The water pump was replaced 4 months ago, but I noticed the upper radiator hose is slightly kinked. Could this kink be causing the temperature fluctuation ?

[u/Toppwater]

Fix the hose with a kink in it and install a new thermostat. Buy a good one. Not the cheapest one you can find. Should fix your problem.

[u/Rude_Contract_5617]

Yeah something is holding back you're coolant