Whisk together sugar, pumpkin pie spice and cinnamon in medium bowl. Quarter biscuits and roll pieces into sugar-spice mixture. Layer biscuit pieces in bundt pan.
Gently pour or spoon ⅓ pumpkin sauce in the bottom of the pan. Layer half the biscuits in the bundt pan. Pour or spoon ⅓ over the biscuit pieces, trying to coat/cover each one. Repeat with remaining biscuits and sauce
Bake for 35-40 minutes. Cool 10 minutes, then carefully turn over onto rimmed serving plate. Be careful when turning over, so as not to burn yourself with the hot butter sugar sauce.