Two problems related to ignition switch have been reported for the 1999 Chevrolet Silverado. The most recently reported issues are listed below.
My truck shut off while driving on the freeway at freeway speeds. I was able to turn the truck back on and headed to a repair shop where I was notified it was the ignition switch which needed to be replaced. There was no warning prior to the incident (no issues with starting or shutting off while in motion).
Abs motor will not turn off after the consumer takes the keys out of ignition.