07 Tahoe Throttle Body issues?

[Mattian04]

I have an 07 Tahoe LTZ with the 5.3. I have had issues with it shutting off while driving while showing reduced engine power. I checked for codes and it produced P0121 & P2135. It happened twice before I was hit in the front left panel and almost everyday after. I'm going to take it to one of my mechanics this week but I would like to know if anyone else has had this issue. I have looked up the codes and researched as all the info points to the throttle body.
Thanks

 

[Begester]

I'm having the same problem, but got a 2138 error code. I cleaned the throttle body (a pretty easy job) but after 20 minutes the light came back on

 

[llllljrlllll]

Change the throttle body, had same issues, changed throttle body, and problem gone..