I recently replaced mine with one I bought off Ebay. part number 85585333. My trucks the 6 speed. I had called local dealer but he wanted over $40 more than an online Chevy dealer so I opted to not buy local.( I always try to buy local). Anyways, my drive to town for breakfast prior to swapping in the new tbv, temps were right at 194-195. After swapping in the new tbv temps were right at 153-154. Truck only has 16k on it and never had the shakes but after reading this thread from start to finish over the past 7 years, I feel good getting this done. It was a simple job, anyone with minimal mechanical skills could probably do this with ease. Next up, swapping in some new fluid.