UMEXT
Original poster
- Dec 16, 2011
- 110
Hi, I had a check engine light on. The associated codes said either thermostat or coolant level sensor. I was (apparently) losing coolant. Today, I had the thermostat replaced at my Chevy dealer; the light is off and stays off.
Unfortunately, the engine now surges, then dies down, then repeats the process. If I stay at idle for more than 30 seconds or so, the engine shuts off. In driving home (a distance of about 40 miles), it has now decided to do the same thing while in cruise control, though the engine does not die in those circumstances. It did not do this, not even once, before the repair.
Do I have incredibly bad luck and timing, or is there a connection between the repair and this new concern?
Thanks!

Unfortunately, the engine now surges, then dies down, then repeats the process. If I stay at idle for more than 30 seconds or so, the engine shuts off. In driving home (a distance of about 40 miles), it has now decided to do the same thing while in cruise control, though the engine does not die in those circumstances. It did not do this, not even once, before the repair.
Do I have incredibly bad luck and timing, or is there a connection between the repair and this new concern?
Thanks!
