Tarazza transmission fluid change
on 2006 Buick Terraza

You recommend chnging transmision fluid every 30,000 miles. Owner's manual recommends every 100,000 unless used under harsh conditions.

Asked by for the 2006 Buick Terraza
I would follow the manufactures schedule. This is what the vehicle engineers have set as the interval. Harsh conditions would be towing, lots of hills, conditions like this.