Ok so the Bravada is at the dealership for 2 separate problems.
#1 is that it has a vibration that is noticeable at 45-55mph and once you are up to 65-75mph it pulsates, meaning that it goes from the level that it is at going 45-55mph and then it will increase in intensity. It is felt through the chassis and not through the wheel or pedals.
#2 is that there is a marked hesitation between 1500rpm and 3000rpm in any gear under all throttle positions.
They have already replaced all 4 tires with Cooper Discoverer H/T'* seen here:
And they still have no idea what'* causing the vibration (tires didn't fix it).
They told me that the hesitation is just how all of the AWD vehicles pickup speed... I HIGHLY doubt that considering that it is rpm dependant and not vehicle speed dependant. All of the other Blazers and Jimmys (granted not AWD) were smooth as silk in term of their pull through the rpm range.
What do you guys think?