High Idle

It can. As long as there are no codes and the car drives fine and accells fine then there is no reason for alarm. Ideally rpm is usually 700-800 roughly but with the newer automatic throttle bodies the engine module has total control.

The needles in the dash display are little motors that go bad and do not give a smooth transition and get stuck at certain points.

Lastly we have what is called a idle relearn. With the gm tech 2 scan tool. So worst case you may need to have a dealer perform this if the idle stays too high. That is what I had you try and do with the gas pedal trick but it is not always successful. Hope I was somewhat helpful.

Is the check engine light gone? It's hard to say if you should worry about it if there is no check engine light. At this point you would need a scan tool that can show the specified rpm vs the actual rpm to know if the module is commanding the system to hold the rpm there. We have a Monte Carlo in our shop. I'll compare.

Ours is right between 900-1000

After a few minutes of warm up we are at about 750-800

Honestly without a check engine light I would not worry about it. This one we have hear if you listen to the dash closely the motor for the needle is really loud and probably sticking. So actual rpm may vary. Hope this information helps.