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Huck · 02-23-2010, 10:35 AM

I'm on my third 5.3 truck and they all have or had cold start noise piston slap. The 2000 silverado Z71 now has 230,000 miles and still runs super. the Tahoe was sold with 85K--noise but once warm ran excellent. Now my 2002 has startup noise and most of that goes away but NOT all. It just turned 104K miles------BG fuel system cleaner????? Maybe I need that?????? What is BG ??

02-23-2010, 10:35 AM	#18
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	Re: Engine noise 2000 Tahoe 5.3 I'm on my third 5.3 truck and they all have or had cold start noise piston slap. The 2000 silverado Z71 now has 230,000 miles and still runs super. the Tahoe was sold with 85K--noise but once warm ran excellent. Now my 2002 has startup noise and most of that goes away but NOT all. It just turned 104K miles------BG fuel system cleaner????? Maybe I need that?????? What is BG ??