I just read your last post so i see the fan is running. Since the cooling system is cooling things down with the engine running I wouldn't worry about the cooling system. This may not be as bad as I thought. I can see the temp raising as the engine heat dissipates. Question is, is all of the engine that hot or is it just that hot around the temp sensor.
Well my true problem is i have been to 3 diffrent Chevy Dealerships now driving 70 miles one way to the closest one. All run test but cant seem to recreate the problem. I have Given Up. on dealership and GM I have gotten nowhere and now I guess my only option has come down to legal council. This really sucks. All of the dealerships basically drive vehicle on I-5 or around town then scan for codes check fan operation and coolant level and send me on my way. Oh and let it sit and run for 1/2 air on checking every 15 min and 1/2 hr air off checking same no other test have been offered or done.
I will take your adivce on compression test and go maybe to sears or somewhere that is advice giving by salesperson who did not want name mentioned at last dealership . He took me for a test drive and i explained my situation he was appled and told me to do that.. If you have any other suggestions for test that I can ask to be done could you tell me. I am sorry to take so much time i am accepting your answer also.
It does seem that all the engine gets hot. Strictly by opening the hood and putting my hand over engine it seems to be putting off alot of heat.
There has been a fan that has come on that was louder than usuall i thought it almost sounded like the car was still running this has happened a couple of times.