Has anybody else experienced this? I have a 2002 V8 LS Sport with 25000 miles. I was driving the other day and out of nowhere it beeps and gives a message of check AdvancTrac. I pull over, turn the car off and turn it back on it and it doesn't come back. Then the next day I started my car and was driving for about 2 min and a beep again. Looked down and it says Check Engine Temp. The needle was all the way in the red. I turned the heater all the way on and started to pull over. After about the 30 sec it took me to pull over it went down to normal operating. I sat there for awhile and it never raised again. I went to autozone and used the scanner and no codes came up. Any ideas?