Hi, The problem is the accelaration of this vehcle, cant pull if 4 pass sitting.

Hi, Thanks for the reply. I have light for "SERVICE ENGINE SOON" in my dashboard and this light is most of the time appears even the service is been done, therefore the problem could be something elese related to power of enginee, may be gear etc, need your advise. Thanks

A lot of the time with GM vehicles with electronic throttle bodies tend to go out there for causing the reduced power code. its typically reset by turning the vehicle completely off and turning it back on because its an intermittent throttle body going out.