I have an '06 silverado with a DBW and I hate this damn electronic throttle. That said, for some reason my throttle is doing what ever it wants to. I turn the air conditioner on and the throttle jumps to 12% on its own when I'm braking to a stop. Also, the truck revs to about 2000rpm(about 10%) on cold start and slowly backs down to idle. I can't figure this damn thing out and it is driving me crazy. Is my TAC module bad? I only ask because my initial tune may have screwed something up. Please help

 

Is the truck tuned? Do you have access to tuning software? Can you post your tune?

 

yes, yes and yes.

My question now is: How probable is it that my tune is a little off?