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Old 05-29-2011, 04:45 PM
03DuraMax4x4 03DuraMax4x4 is offline
Join Date: Sep 2010
Location: Hattiesburg, MS
Posts: 52


I use the GM Diesel Additive every 1,500 miles, but may shorten to every 1000 miles. The diesel tech at the dealership recommended changing it every 15K, but I've already have to replace the injectors and am paranoid about them going bad again.

03 Chevy Silverado 2500HD LT 4x4 6.6L Duramax, leather, fully loaded, 285/75R16E BFG A/Ts, spray-in bed liner, 154K miles.

Future upgrades: Banks Power Big Hoss Bundle.

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