Hi My 2011 Silverado 5.3 was telling me I still had like 35% of my oil life left after 9000 or so miles since my last oil change, but I brought it into the dealer anyway. I needed my bowtie replaced and wanted my tires rotated so I had my oil done since I was there. Upon speaking to the service guy I was advised to disregard the oil life % indicator and bring the truck in after every 5000 miles regardless of what the computer told me... 9000 miles does seem like quite a long time, especially considering the amount of city driving I do. Somebody tell me who to believe, my car's computer or my dealer mechanic. Thanks!