New to forum and had my silverado all of 3 weeks now and it's been in the shop for over a week. Long story short, let my family borrow it to tow the horse trailer down to a show in Charleston and get a call on the way that the oil pressure light is on and the pressure was at 0. Told them to press the Onstar button to see if they could help and they told them to keep going. Got the truck to the dealer down in Charleston (they've been pretty helpful and keeping me informed) and they said there was a service bulletin out about the oil sending units and pressure gauges. Anyways, local dealer had not heard of this bulletin, but replacing both seems to be the fix. Will find out on Monday as they are sending a driver to go get it. Anyone else had this problem?