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Message: <blockquote data-quote="99Sierra2500" data-source="post: 29258" data-attributes="member: 12343"><p>GMT800's are popular here, I see them everywhere, it's just that they are rusty. I have heard those pellets from the charcoal canister are a bummer to clean out. When things go bad, people sometimes just replace everything. I don't know how much it has to do with the function of the vehicle, though to get rid of it, I think the PCM has to be reprogrammed, and most places aren't going to want to do that. Emissions stuff is a chore to deal with, though it is also illegal to modify or remove.</p></blockquote><p></p>