To be precise, you'll need to consult a repair manual specific to your Vibe's year and transmission. The manual will show you a diagram and give detailed instructions on its location. Searching online for "[Your Vibe's Year] Pontiac Vibe repair manual" will likely yield results for a free PDF download or a paid version.
While a general location is the transmission, it could be on:
* The top of the transmission: This is a common spot.
* On the side of the transmission: Less common, but possible.
Without knowing the specifics of your vehicle, providing a more exact location is not possible. Using a repair manual is the only reliable way to determine its location.