I'm used to seeing around 80 degrees above ambient in the '12 Silverado, '15 Silverado, '20 Sierra and '11 Yukon XL Denali so seeing 110 -120 above ambient is a little unsettling. But I do understand the cooler is in the radiator unlike those trucks so in slow moving and stopped situations the temps will eventually equalize. I also understand that the point at which these fluids (especially synthetics) break down is closer to 280.Thats not hot. You need to get the fluid over 200 degrees to remove any moisture from condensation. Any synthetic fluid should handle those temps quite well.
But my brain is deficient in some ways and drain and fills are so easy to do on the Traverse that I will likely look to do it every 2 or 3 oil changes.