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Message: <blockquote data-quote="penismightier" data-source="post: 2111184" data-attributes="member: 4108">Do not get the 5.3.... They are crap.  Mine burns a quart of oil every 1500 miles.  GM says it falls within their QA specs and is not an issue.  ********!   I've got an 07 suburban with the 5.3   I got it at 25k miles and it currently has 102k.   The engine is significantly underpowered for such a large vehicle.  I would go back and get the 2500 with the 6.0 if I could do it all over.I know of several others who have the 5.3 and all say the same thing about burning oil and being underpowered.</blockquote>