Because its location is somewhat obscured and access can be difficult, you'll likely need to consult a repair manual specific to your year and engine to get a precise visual and access instructions. A diagram in the manual will be very helpful. You can often find these manuals online (for purchase or sometimes free PDFs) by searching for "2001 Chevy Tracker V6 repair manual."
Don't rely solely on general descriptions; a visual reference is crucial for proper identification and access. Attempting to locate it without a visual guide may lead to unnecessary frustration and potential damage.