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Old 09-06-2013, 10:21 PM   #2 (permalink)
Black02Silverado
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Join Date: Jul 2010
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Just follow what was posted over in GM-Trucks. It is good advice. You have the maintenance plan from GM, follow that and then from there on after just make sure the oil you use meets dexos1. Going full synthetic never hurts but is overkill unless you don't mind spending the money or plan on extending you oil drains.
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