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Most have a breather tube location on the top of the case, along with the transmission lines any may cause a leak.
Follow this link to get a free service manual, look for the GM section.
173 FREE Automatic Transmission Repair Manuals
It's sort of GM, Fuyao Glass America took over the Moraine, Ohio GM plant which closed 2008. Fuyao, a Chinese company, is a GM OEM glass supplier along with others. LOL GM use to make SUV's here talk a cluster F.
Well you posted in the Buick Century Forum, but it can disable the chimes. Unfortunately to many variations on the stereo and wiring harness used to give a absolute. Check with the installation shop on what they did, there are aftermarket chimes that can be added to a system.
May want to check Ebay
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