Used and remanufactured engines that fit the 2006 Cadillac Sts. Each unit below is matched to this vehicle, warranty-backed, and shipped with freight quoted at checkout from EP Engines.
Rule of thumb: a engine replacement is usually worth it when the installed cost stays under 40% of what the 2006 Cadillac Sts is worth — most units below beat that comfortably.
As a general rule of thumb, an engine replacement on a 2006 Cadillac Sts (luxury segment, vehicle value roughly $6,000–$6,720) is usually worth it when the installed cost stays under about $2,400 — roughly 40% of what the vehicle is worth.
Based on vendor-verified fitment data across 7 listed engines, remanufactured and new engines for this model cover the 2007–2011 model years. Always confirm your exact VIN or engine/transmission code before ordering, since fitment can vary by submodel or engine.
