To be certain, you should:
* Consult your vehicle's repair manual: This is the most reliable source. The manual will have diagrams showing the exact location.
* Use an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to search by your vehicle's year, make, and model and view diagrams showing parts locations.
Without knowing the specific engine in your 1997 Tahoe, I can only give a general location. Always refer to a repair manual or parts diagram for precise placement.