I noticed the other night on the way home pulling the horse trailer that the heat hand on my truck would slowly ease down to the margin line and then ease back up to about 190?? Headgasket maybe?? any helps appreciated!

 

sounds like the thermostat just doing its job

 

But its never done like that before it always just stays a little under 190

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But now that i think about it I guess the hand would be jumpin around if it was headgasket instead of just moving up and down slow.

 

Yep thats normal, no worries

 

mine dances around as well. my buddys 04 duramax does it as well. Its norm just dont want to go any higher then I would worry.

 

Mine does the same.

 

forget to take off your winter front?