Car wouldn't shift into 3rd gear tonight.
Oh...it also had 235K miles on the tranny.
It might just be low on tranny fluid (check for leaks), but I would make it the dealer's problem post haste.
I had numerous (4) issues with the 4L60E in my S-Blazer that required 4 rebuilds. I will never purchase a GM vehicle with the 4L60E.
4T60E / 4T65E I have complete confidence in. I'm thinking fluid or electronics with these things - agree w/ 06SS - dealer issue.

