Rev limiter
Because it has a rev. limiter
No automobile engine will even run at 2 rpm's. The average engine idles at from 650-750 rpm's, and will easily rev to 5,000 rpm's.
When u want to go to downshift bring Ur rpm down to 1100 but in out of gear and rev the engine rpm to 1400 or 1500 don't over rev it.
there is a rev limit setting in the ecm so you dont over rev the motor
an electric motor can be build with over 2000 rpm,by increasing the supply frequency.
there is a rev limiter in the computer to keep you from blowing your motor.
It may have a rev limiter or the computer may control this, but it has no governor.
yes it does at 3000 rpm ( when it is in PARK or NEUTRAL so there is no load on the engine )
Rev. limiter?
If the Yukon engine has high rpm while driving, check the transmission for slippage, that will cause the engine to over rev. The overheating could be caused by the high rpms.
maf sensor