Well, yet another problem with my Sierra. I have barely reach 31,000 miles and this thing goes into the dealership every few months. My transmission is now having two problems.
1) Occassionally (4 times in two months) when I leave a stop sign very slowly, the truck will not go forward and the engine revs up slowly (like it is still in second gear), and then pops and the truck moves normally.
2) At 40 mph, I push down half way on the accelerator and the truck downshifts. However, the downshift bobbles into gear and then when I release the throttle, it bobbles back into gear. This doesn't happen all the time but today was repeatable for a few miles.

Any ideas on the tranny? This goes along with the replaced dash, new U-joints, new mirrors, bad oxygen sensor, steering linkage kit, bad door lock solenoid, ABS light went crazy, and a few things I probably forgot.