Acceleration limiting-The PCM will continue to use the accelerator pedal for throttle control, however, the vehicle acceleration is limited.Reduced engine power may cause one or more of the following conditions: When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system. The "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems.
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