[ccracin]

We have a 2007 GMC Sierra Crew Cab 4x4 with the 5.3 that has active fuel management. NOT flex fuel. We changed the oil about 2K miles ago and noticed that we only got 4 quarts out of it. The previous change was done by the dealer. We thought maybe someone made a mistake at the time. So will filled it to the full line on the dip stick. Almost 6 quarts. Then the day before yesterday my Dad started it in the morning and it made a terrible mechanical racket. He immediately looked at the oil pressure gauge and "0". As he went for the key to shut it off the needled jumped and the noise quit. He shut it off and checked the oil level. It was about an inch down on the stick. Probably 1.5-2 quarts low. We got it up on the jack and crawled around under it. No visible leaks and no drips on the driveway. It also does not smoke. WTF! Anyone else seen this? He took it to the dealer yesterday and they made him an appointment this morning. They are going to change the oil and have him come back in 1k miles to check the level. Can someone check to see if there are any bulletins on this? I want to be prepared to "discuss" this issue. Thanks for any help.

Later,