Throttle Position Sensor (TPS) Error
 

My check engine light came on my '07 Tahoe and I hooked up a code reader for it to tell me that error I was getting was from my Throttle Position Sensor (TPS).....

I have gone to get a new one but no one carries it (Autozone, Orielly, etc...)
I then went to the dealership for them to tell me that I have to replace the whole throttle body (I call BS on that one but then again I don't know anything about the TPS.)

Can someone help me out? Any insight on the subject would be appreciated and if anyone knows where I can actually buy one that would be AWESOME!

Remember that just because the DTC says it's the TPS, doesn't necessarily mean that it's bad. You really need the troubleshooting tree in the shop manual to find the real problem.