TRUCK KEEPS DYING EVERY OTHER WEEK

[HummerJim]

Sounds can be deceiving but I'm 75% sure it's coming from the area of the transmission. My '08 does the same thing if you let your foot off the gas abruptly. It doesn't do it all the time though and I think it's something with the 6 speed.

[solarflare]

Now with mine, it's not as much as a noise that you hear, but rather a nasty clunk that makes the truck shake. It does it when slowing down slowly, foot on the brake (city traffic-stop and go), and it seems as though the torque convertor sticks between 2nd and 1st gear.....as if it hesitates before it shifts down to 1st gear. Does not do this when slowing down fast. Doesn't do it all the time, so it's hard to bring it in to have it checked out.
Wondering if a programmer would remove the TCM system that causes the problem....perhaps? Any other thoughts???