Upon purchase of a new 2015 Tahoe I observed the possibility of a problem with the forward collision alert system (fca). I reported this to the service manager at Chevrolet. On 9 April 2015 the service manager, assistant service manager, master technician, and I took the vehicle for a test drive. While driving the vehicle at moderate highway speeds I demonstrated the various phases and operation of vehicle detection. The fca has plenty of sensitivity and detects vehicles in excess of the specified distance in the owner's manual which is not an issue. At a moderate closing rate between vehicles the instrument cluster icon changes from green to amber-orange which appears nominal. However, the red alarm heads-up windshield display, rapid high-pitched beeps and red icon are never activated until a closing distance about ~3 feet before a collision. There is virtually zero reaction time for a driver to brake the vehicle at less than one car length before going to red. In addition, the system is supposed to disengage the adaptive cruise control (acc). Considering time, rate, and distance this is ineffective as the mass and kinetic energy also needs to fully disengage before a potential collision. Because of the danger of creating a traffic incident the vehicle was not tested to the level of a full collision. I was informed by the service manager that there are no service bulletins, adjustments, or software patches that may correct this deficiency by the dealer. GM stated that the system works as designed and delivered. The GM forward collision alarm (fca) delivered product appears to have a design deficiency and is an operational safety hazard waiting to happen. If the fca does not function properly then why introduce it to a consumer regardless of GM owner manual warnings about trusting alert systems.

- Goleta, CA, USA

The entertainment systems was pulled down by my kids to watch a movie. When the dvd screen was pulled down it completely blocked the driver rear view mirror. As such....you cannot use the entertainment system and drive at the same time in the vehicle.

- Pittsboro, NC, USA