Transmission not shifting
I've got an '02 Trailblazer. The owner we purchased it from said that he had the transmission replaced with one that had approx 80,000 miles on it. A couple weeks ago the check engine came on and the tach shot up to 4000 rpm. I put the OBD2 on it and it coded for the VVT. I replaced it and the code cleared. It still was not shifting. I replaced both Shifting Solenoids thinking one of them was the issue, and it's still not shift. I'm at a loss as to what to check next.