2011 Tahoe oil pressure guage

[Walleye503]

Hello

I recently bought a 2011 Tahoe with 60,000 miles. I noticed that my oil pressure guage fluctuates when under power. My 2012 Silverado does not do this at all. At idle the oil pressure reads just under 40. When under power either in drive or in neutral the pressure guage rises. The oil is at 95% and full.

Is this normal?

 

[kels.24]

Same year, same mileage, same issue. Wish I knew!!