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Message: <blockquote data-quote="Griswold" data-source="post: 368254" data-attributes="member: 9388">RMW specific things I would watch for (I owned 2-96 RMWs):- Water leaks (then rust) in the rear pillars. I never figured out how water was getting in.- Opti-spark: I never had a problem but they cause a lot of grief- On tow package cars, changing the serpentine belt is absolute murder because it is threaded behind a hard pipe for the cooling system. Even worse, if the tensioner goes on the other belt, you are screwed because replacements aren't available anywhere. Only option is to convert to electric fans which isn't as easy as it sounds.- GM says Dexcool coolant is good for 10 years, then change it every 5 years. Follow it to the letter, otherwise the heater core will plug up, then no heat. No fun to flush out in a deep freeze!Otherwise, they are very reliable.</blockquote>