have a 2000 4by4 zr2 blaser that i had a new trans but in because in the morning the truck would buck and seemed to take off in second gear.After a short time it shifted allright.But i had a new trans put in and in the cooler morning it does the same thing.So now do you think it might be the vcm or something that causes it to just after it sit allnite to not want to shift right on till the trans gets warm? I know it could be a hundred things but say input would be nice.Thanks