Paul_’18 Silverado

So....is there a solution to this problem or more speculation?

I have a infrared thermometer, I did check the thermostat and where the needle was in the picture, my reading at highest was 96deg C. I agree that 120 is too hot, but why does it fluctuate that way and why just why, if the Obd temp is different than what I see, if I didn’t know any better, I’d be taking the truck in for a ghost problem thinning my pocket for non warranty covered diagnostics, I have never had this with any other truck I’ve owned. anyway, I’m at the point of doubt with this truck, between this and down shift clunk rough drive train, thin paint that chips easily, fuel saving gimmicks on a truck, cheap fisher price plastic dash and interior that creaks, rattles fastened by push clips...I don’t accept “within Spec” or “normal” according to gm anymore. Very disappointed with this $ 60000 truck, should’ve gotten that FORD I had my eye on. also the dealer we purchased from(not the dealer we use for service) had us sign a non resale clause or something to that effect, that would blacklist us with gm on future purchases should we sell our truck to the us market. At this point do I really care!? First and last gm I purchase . also, why does gm canada and gm us have different tsb bulletins for the same common issues on these trucks. Not bad grammar, it wasn’t a question...

Is it normal for the temp gauge to fluctuate? temp in picture is from idling and revving in park up to 3-4000 rpm with outside temp being 20deg C. It also climbs when accelerating up hill with no load at same outside temp of 20deg C...it does go back to a needle width below 100 right after called dealer, said it’s normal up to 120deg C. Anyone experience this? 2018 Silverado 5.3 with 27000km