bought this truck brand new in the summer. when cold weather arrived it derated so bad couldn't drive it. warranty would put in shop over night and next morn its warm no problem. was towed in at onstar advice after codes where read but warranty would only say truck wasn't built for extreme cold. so I am stuck with a truck that is very difficult to get running smooth on cold days to the point I can drive it.

Chevrolet Canada says there is nothing wrong with truck so how does one fix it? I cant drive it in winter and I cant afford a different one its off warranty and I have complained numerous times to Chevrolet Canada. onstar has records of the derate and codes but they still say nothing is wrong