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Duf · 05-06-2008, 05:27 PM

GM propaganda says the bad pistons of the '00-'02 5.3 engines were replaced with "New and Improved" pistons for the model year 2003. HAH !!
I bought my 2003 Silverado 5.3 new and the engine has knocked since about 10k miles and puffs out a big cloud of smoke every time I first start it .... summer or winter. I use Mobile 1 10w40 in summer and 5w30 in winter.

05-06-2008, 05:27 PM	#192
Duf Registered User Status: Offline Join Date: Dec 2007 Member ID: 80114 Pics: My Gallery Location: Mid-West Posts: 22	Re: Recalls & Engine Knock Info GM propaganda says the bad pistons of the '00-'02 5.3 engines were replaced with "New and Improved" pistons for the model year 2003. HAH !! I bought my 2003 Silverado 5.3 new and the engine has knocked since about 10k miles and puffs out a big cloud of smoke every time I first start it .... summer or winter. I use Mobile 1 10w40 in summer and 5w30 in winter.