TPS is DRIVING ME NUTS!

[harbison]

Stabilitrak, Reduced Engine Power, CEL, you know the routine.
2009 GMC Yukon XL 5.3L
I've replaced:
MAF Sensor
Throttle Body
Throttle Position Sensor
TPS Harness
Accelerator Pedal w/ Sensor
All AFM valve lifters
Disabled AFM with DiabloSport

I don't know what else to do to get rid of this problem! Can anyone help?

 

[Meccanoble]

What CEL code do you get? I seen a few threats about this recently, hopefully not all from you.

 

[harbison]

My son erased it before I could get the number. He said it was Throttle Position Sensor and Accelerator Position Sensor.