Step 2 · Plunge the Toilet
Before disassembling anything, attempt to clear the toilet's own trap with a flange plunger. While a simple clog here doesn't usually cause gurgling with other fixtures, it's a quick and easy step to rule out. Place the flange plunger into the toilet bowl, ensuring the flange extends into the drain opening to create a tight seal. Push down gently to expel air, then plunge vigorously up and down 10-15 times, maintaining the seal. This can dislodge any partial blockages contributing to the problem.