As said what problem is there, you burn more fuel, you create more heat, the fans come in, if it is not overheating etc then stop worrying.
I had a new 88C stat in mine(gen ford) and it still ran at 70C - 73C, I've now fitted a new(gen ford) one of 82C and it runs at 79C - 84C, hotter than the hotter stat!!.
I don't rely on the gauge, as all my sierras have been naughty with readings.
tabetha