2008 trailblazer

Hello!:undecided I'm in the process of buying a 2008 Trailblazer LT2 4.2L 4x4. The buyer has informed me that it won't come out of 2nd gear. I've priced rebuilt transmissions and found a builder that wants $1700 + including shipping to Dayton, Ohio. The issue is this, the truck sits 140 miles...

GOT MY 2008 TB BACK FROM THE DEALER. HAD BEEN GETTING A ROUGH IDLE MORE LIKE A STUMBLE WHEN SITTING AT A STOP. WENT THROUGH REPLACED PLUGS, NO CHANGE. I WOULD GET AN INTERMITTANT CODE FOR INSUFFICIENT SPARK ON THE #6 CYLINDER. I WENT OUT AND BOUGHT A NEW COIL AND PLACED IT ON THAT CYLINDER, NO...