Get the OBD2 codes read
03 silverado dreaded reduced engine power
Anybody??? I have changed throttle body and harness, gas pedal and harness, ive reran grounds that were broke including the main one that causes this issue and im still getting it Intermittently.. any other suggestions??? 03 silverado with the 4.7.
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Codes are p1125,p1515 and p2135...
I would say, based upon those three codes occurring at the same time, that you have a wiring harness problem, or a ground (near the accelerator) problem
Ground near accelerator sounds reasonable. Like, under the dash around the actual pedal. Might even be a sensor attached to the pedal since it is drive by wire.
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