Car Throttle Sticking problems of the 2000 GMC Sierra

I just bought a 2000 GMC Sierra 1500 pickup with the 5. 3 liter engine. The throttle sticks when you start off in it from a stopped position. The accelerator has a tight spot in it when you first press on it. This can be very dangerous if it sticks too much when it breaks loose the truck will go forward real quick and you could hit somebody or something. Someone told me that the butterfly had carbon built up on it and it needed cleaning. I called a gm dealer and talked to the service manager and he said it was reported before and he would clean the throttle valve for $90. 00. I think this should be covered by the manufacturer and besides it will happen again when carbon builds up on it again. A permanent fix needs to be put in place as a recall item I think.

Throttle pedal sticks during startup. Mr.