One problem related to engine shut off without warning has been reported for the 2005 Chevrolet Silverado. The most recently reported issues are listed below.
Vehicle quits running and may restart after 10 minutes or may not. It shuts off at any speed and at red lights. When on a hill it will roll back into whatever is behind. This vehicle has been to the dealer 6 times and they can find nothing wrong. Sometimes there is power to the dash and lights, other times the dash goes dark as if there was no power at all.