Like Nokiddiegloves said, you can always ask on the walkie. Even the TMs who have been in my store for years ask "Team, where is (item) located?" or "Team, do we sell (item)?"
If all else fails, what you could always do is download the Target app on your phone, set it to your store's location, and search it. If your store sells it, it should at least show what aisle it's on. Now if you want a specific location, just click on Product Details and the DPCI should be at the very bottom. Just type that
xxx-xx-xxxx number in a MyDevice, PDA, or on a register in the Location button.
I've found that downloading Cartwheel, Registry, and the Target app actually help a lot with guests' questions. At least it's helped me a lot.