Had Duramax since 02, and have a total of about 600,000 miles on 4 with a new 2015 due to arrive 5/1/14. Was a member here early on, but apparently got dropped as I was to busy restoring and showing classic Pontiacs, which I still am too busy doing. Selling off a lot of great LBZ goodies that do not fit the 2015. Very active business with Classics West and Pontiac Parts West. Several years ago I built Duramax trucks for Southern Mexico and Central America adventures - oh yea, spent several hours in a Mexican Military Prison with truck impounded. A HUGE fan of Mike L for towing - I tow 24,000 to 33,000 GCVW ( truck, 46' enclosed trailer, 2 Super Duty Pontiacs, and 2,000 lbs of parts) up I-70 in the Rockies, going up out of Needles, CA at 115 degrees outside, and up the CA grapevine, and have NEVER had the transmission go over 210 - and after 185,000 miles, tranny also shifts better than new. I've had 4 careers (Attorney, Lower Court Judge, Las Vegas CEO, Realtor) and now am full time playing with cars. Great Life.