Reduced Engine Power On Chevrolet Silverado

Chevrolet Silverado 2003 5.3L. Warning lights- engine light.
Question
My truck is running, the engine light is on, it says power reduced, but the gas pedal doesn't work.

Answer: With the engine light on, there is a code stored in the computer. You need to get that scanned. You most likely have one of two problems:
1. Either there is a problem with the gas pedal- it is electrconic, or the throttle body- also elecronic. You have the drive-by-wire system. 2. The most comon cause is the throttle body. GM has service builletins for this and a recall, so it may be covered under factory warranty. Call your local dealer and ask them. They will tell you if the throttle is under a recall.

2003 Chevy Silverado. V-8, 6.0L.
Warning lights: Engine light and "Reduced Engine Power".
GM Computer codes = DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance.
Question:
Based on the trouble code (P1516), is this anything I can fix? Is there a web site that shows photos of how to do this.

Answer:
This is a fairly easy fix, although not cheap, unfortunately. The trouble code you have set is due to a problem with the Throttle Body on the intake manifold. It is an electronic unit and not cable driven. There is a solenoid/actuator inside which is what opens and closes the throttle body when you push on the gas pedal. When there is a mismatch between how much you are pressing the gas pedal and the actual angle of the throttle blade, you will set a DTC P1516.

The fix for this is to replace the Throttle Body Assembly, and don't forget a new gasket as well. Be sure and check the wiring at the connector for loose terminals, bad connections, or broken wires...this could cause a problem as well, and I believe there is a GM bulletin about it.