Hi 

I had my 2013 Astra 2.0cdti in for service last week and was told it had a recall to "upgrade the cars software". I've since learned this is an upgrade to the ECM software.

Since the service it simply does not feel like the same car. I'm having to change down gears to get up hills I've driven everyday without the need previously for example. 

Does anyone know what is involved in this upgrade and if it could have altered my car's performance? I believe the upgrade may have something