2010 Aveo temp gauge fluctuating

[avguy]

Mechanic confirmed the head gasket is blown. How common is it for a 2010 with only 40000 miles to blow the head gasket? I bought the car from a dealer only a month ago and was running fine until the temp gauge started fluctuating.

But you said all fluid levels and quality were ok. I'm having trouble figuring out how none of the fluids are affected if it's a blown HG. But if it is the HG, then what is the powertrain warranty for a 2010?

[2010AveoLT]

But you said all fluid levels and quality were ok. I'm having trouble figuring out how none of the fluids are affected if it's a blown HG. But if it is the HG, then what is the powertrain warranty for a 2010?

its a 5 year/100K Powertrain Warranty, and it covers pretty much all the mechanical parts of the Engine and Transmission only; if you have an electrical/electronic problem, you are pretty much up S(*&T Creek without a paddle; as the electrical/Electronic parts are only covered by the 3/36 Bumper to Bumper Warranty, and the PCM and Cats are covered by the 8/80 Emissions Warranty. and to the OP, did you buy your Aveo used, because I have a feeling that your engine has been abused; because I have the same Model Year, with 69,218 miles on her; and besides a bad O2 Sensor that I need to replace, she runs like a little Metronome despite being a Former Enterprise Rental Car!