Hey guys! New member here!
Our 2009 Suburban has developed a weird hesitation/shaking around 2-3k rpm. It is most noticeable when towing anything or accelerating heavily. It is also noticeable during shifting, but I think that's a function of the RPM more than anything.
We just had to repair the radiator due to a rock puncture. I made sure to check the tranny fluid and top off as a bit was lost out of the cooler during the removal process.
Ive checked vacuum lines and everything is good.

Any ideas? Tanks!
Jason