Considering we have achieved over 20 mpg in a Suburban with the 6.5 turbodiesel, which is less efficent than the Duramax, I believe those vehicles are being driven abnormally. Another possibility is they aren't broken in. The Duramax takes about 50,000 miles to get the economy up (as did the 6.5 litre).

The GMC is definitely nicer than the Chevy, as dull is better than ugly. However, I think it needs more style to compete with the Ford or attitude to compete with the Nissan.

Brad "Diva": 2004 Mazda 6s 5-door, Volcanic Red Rex: 1988 Mazda RX-7 Vert, Harbor Blue.