I'm not sure if you're talking about the dipstick (oil level indicator in GM parlance), the tube it slips into, or both. These parts aren't sold through generic auto parts stores. Although General ...

I have a 1993 Subaru Loyale four-wheel-drive wagon. The transmission-fluid dipstick has broken off the cap. The stem is down the fill tube beyond where I can reach it with a telescoping magnet. I ...