I have a 2007 1/2 Silverado 5.3 AFM. first indication of oil use was during a trip to Florida. Add oil light came on with 30K on the Odometer and 50% of oil life left. Concerned but knew GM oil policy was that unless it was over 1 quart in 2000 it was not considered excessive. Next few years had to add 2 quarts in less the 5K so still did not report to dealer. Forward to March of 2014. Oil light came on at 58K and again at 59K, had to add 1 quart over 1100 miles, primarily interstate highway driving. Local driving it does not use this much, that's why it did not show up earlier and it appears it get worse with higher mileage. Needless to say it was 9K and 1 1/2 out of warranty.

GM issued first TSB to dealers in 2010 about this problem, latest revision is #10-06-01-008G. They don't issue TSB's unless they know there is a problem. Neither GM or the Dealers contacted customers they might have one of these engines and to start checking. The less you drive, especially highway miles, the longer this is going to take to show up. If you only drive it 5K a year you may not notice the oil consumption until 12 years and 60K, probably will be a lot of older people in this category.

You can download the TSB Here: Paste this into your browser. If it does not work contact me and I will get it for you. You can also Google: #10-06-01-008G PDF

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=3&ved=0CC0QFjAC&url=http%3A%2F%2Fwww.camaro5.com%2Fforums%2Fattachment.php%3Fattachmentid%3D478973%26d%3D1362088367&ei=YUmqU8r3HJeeyATKyoKABA&usg=AFQjCNFuh-TvzH18IEv4Xb86EI_hzDnm-Q&bvm=bv.69620078,d.aWw

Working with dealer but at this point they want me to pay $1750 approximately if it needs new ring and pistons. Could be more if it needs a new engine. Anything less than rings and pistons would be all my expense.

I would be interested in hearing from you with your experience especially if you would like to participate in a Class Action Suit.

Hermannc Newland NC

Update from Jun 24, 2014: dherman28657@gmail.com I have a 2007 1/2 Silverado 5.3 AFM. first indication of oil use was in during a trip to Florida. Add oil light came on with 30K on the Odometer and 50% of oil life left. Concerned but knew GM oil policy was that unless it was over 1 quart in 2000 it was not considered excessive. Next few years had to add 2 quarts in less the 5K so still did not report to dealer. Forward to March of 2014. Oil light came on at 58K and again at 59K, had to add 1 quart over 1100 miles primarily interstate highway driving. Local driving it does not use this much, that's why it did not show up earlier and it appears it get worse with higher mileage. Needless to say it was 9K and 1 1/2 out of warranty.

GM issued first TSB to dealers in 2010 about this problem, latest revision is #10-06-01-008G. They don't issue TSB's unless they know there is a problem. Neither GM or the Dealers contacted customers they might have one of these engines and to start checking. The less you drive, especially highway miles, the longer this is going to take to show up. If you only drive it 5K a year you may not notice the oil consumption until 12 years and 60K, probably will be a lot of older people in this category.

You can download the TSB Here: Paste this into your browser. If it does not work contact me and I will get it for you. You can also google: #10-06-01-008G PDF

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=3&ved=0CC0QFjAC&url=http%3A%2F%2Fwww.camaro5.com%2Fforums%2Fattachment.php%3Fattachmentid%3D478973%26d%3D1362088367&ei=YUmqU8r3HJeeyATKyoKABA&usg=AFQjCNFuh-TvzH18IEv4Xb86EI_hzDnm-Q&bvm=bv.69620078,d.aWw

Working with dealer but at this point they want me to pay $1750 prox if it needs new ring and pistons. Could be more if it needs a new engine. Any thing less than rings and pistons would be all my expense.

I would be interested in hearing from you with your experience especially if you would like to participate in a Class Action Suit.

hermannc Newland NC dherman28657@gmail.com