Hi,
I have an AVEO5 2010 LT and I have got a problem with it.
It seems that at 2500 RPM the car can't up above and a heavy sound is emitted if I don't hard press the accelerator. If I hard press the RPM grow up with a regular sound .
The GM dealer doesn't find any problems after 1,5 hours of observation. There is no check engine light.
I opened a call at GM for that.
Do you have any ideas of the cause ?
Thanks.