superjim

Nice truck.

If you ain't white...you ain't right...

I would be looking for a vacumn leak. Probably around the intake...downstream from the MAF.

Actually.... I thought the GMPP abbreviation was typically used for the...... General Motors Protection Plan = Extended Warranty.

I am assuming that it is DRIVE BY WIRE. If so, it would HAVE to have two TPS sensors to have any kind of safety margin. They have to agree of the computer, (figurativly) just throws up it's hands and says... "I don't know what you want to do... so I am not doing ANYTHING." and shuts off most of the fuel. If it only had ONE TPS... and if malfunctioned... it could command wide open throttle (or anything in between) AT ANY TIME. That would usually be considered... NOT GOOD. There has to be feedback and agreement between the two, for it to operate properly.