Check Engine Light On problems of the 2004 GMC Sierra

The contact owns a 2004 GMC Sierra. The contact stated that while driving his vehicle the check engine light illuminated and the message reduce engine power appeared causing the vehicle to reduce speed. The contact stated that the failure happened several times without warning and it was a safety hazard while driving on the highway. The vehicle was not taken to the dealer. The manufacturer was contacted and stated that they were not able to help until the vehicle was inspected. The vehicle was not repaired. The failure mileage was 48,000 and the current mileage was 55,000. Updated 04/12/lj.