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Message: <blockquote data-quote="ORVietVet" data-source="post: 21612" data-attributes="member: 9438">Yes I am suggesting that about the fuel pump. Pay attention to not only the bed length but the RPO codes related to evap system. If your 8th digit of the VIN is a T then is a gas engine and if is a Z, it is a flex fuel system. Might want to address the tank vent valve and maybe even the charcoal cannister while in there and blow out the "disconnected at both ends" lines. Purge valve at top of engine is easy enough to get to at any time. I am a big advocate of doing all kinds of things, while I am "in the area".That is why I would put my 168k miles 2005 Z71 Tahoe up against any GMT800 Tahoe on the street. I have all of the paperwork to back up my claims. The 2004 Silverado will also go thru the same "once over".</blockquote>