2007 hummer h3 here in Florida today is 100 degrees. Ac is on high . Temperature showing 3/4 is that normal ? Should I worry that it goes to that level?

 

I would! Look at the symbol in the middle of the gauge and compare:

 

That is not overheating. That's fairly normal. Mine gets up there during hot muggy late summer days. Of course just briefly.

 

Normally it is less though. Maybe Lil over half mark.

 

usually it’s where this mark is but when it’s really hot outside and humid and I have the ac cranked up I get to that level but no more than that . It’s at the last line of the symbol I guess if would compare? Is that bad ?

 

also how can I make it go less ?? I have oem thermostats that I replaced not that long ago, the radiator is not that old and I flushed her about a year ago with gm orange coolant that is recommended . What else could I have done to make her cool more ?

 

Water pump. Fan clutch. Antifreeze additive.

 

water pump been changed not that long ago but fan clutch I don’t think this been changed and antifreeze addictive like what?

 

What temperature are you actually getting? Also if you search the forum, there has been tons of threads about this. I am new to this truck, mine also gets to 3/4 on the dash, but the actual temp is 215F

 

how do you know the exact temperature?