art marshall

It has

'17 Sierra 1500, 5.3 8 speed. The engine has always stuttered and surged when cruising between 1500 and 1750 rpm. Basically when traveling at 65 to 70 mph. I can feel it of course, the tach shows it, and the gas mileage reading drops to like 8 or 9 mpg. When new I mentioned it to the dealer and honestly don't remember the dialog we had. Now at 71000 miles it is becoming either more pronounced or I am more focused on it. Is this occurrence common with the 5.3, 8 speed?