The brake lights intermitently will stay on running the battery down
every thing is fine for a time then without warning they stay on, have to disconnect the battery to keep the battery from running down
there is an electronic switch behind your brake peddle. when peddle is pressed down it hits this switch turning on your brake lights. this switch it sticking i might be able to clean it but will probably need to be replaced.
...okay looks like you may be able to adjust the nose to make it come on less frequently...https://www.google.com/#q=2000+Oldsmobile+Silhouette+brake +light+switch&tbm=shop
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