Tenn. Code Ann. § 35-15-606: Settlor's powers - Powers to remove and appoint trustees

(a) The settlor of a revocable trust may remove a trustee and appoint a successor trustee by giving written notice to the trustee being removed and to the successor trustee being appointed.

(b) If there are two (2) or more settlors of the same revocable trust, then the removal and appointment of trustees must be made by unanimous decision of all settlors.