2004 GMC Envoy Owner's Manual - Page 168

Cruise Control Light This light is displayed when a noticeable reduction in the vehicle's performance may occur. The vehicle may be driven at a reduced speed when the reduced engine power light is on but acceleration and speed may be reduced. The performance may be reduced until the next time you drive your vehicle. If this light stays on, see your dealer as soon as possible for diagnosis and repair. This light may also come on if there is a problem with the Electronic Throttle Control (ETC) system. If this happens, take the vehicle in for service as soon as possible. United States Canada Your vehicle may have this feature. The CRUISE light appears whenever you set your cruise control. Service Four-Wheel Drive Warning Light Reduced Engine Power Light United States United States Canada Canada This light should come on briefly when you turn on the ignition, as a check to show you it is working. 3-48