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Message: <blockquote data-quote="flynhghr" data-source="post: 25695" data-attributes="member: 9516">I have to ask, how many miles?  Not just curiosity but in those years GM didn't really figure out how to keep the heart beating.  The best bet is quality synthetic oil and change it every 4-5k despite what the dash says.  If it hasn't had the timing chain replaced do it AsAP!   The pay for play sound won't improve the ability of the speakers in your car to produce quality audio.  You'd have to get quality replacements or a good bluetooth speaker.  I'd check Newegg.com or other vendors for quality speakers.  Most vendors will know your car's speaker mounts and offer better units.</blockquote>