Welcome to the Owner's Manual for the 2005 Cadillac STS, a full-size luxury sedan built on the GM Sigma platform. This vehicle represents Cadillac's commitment to blending sharp, angular styling with advanced technology and refined performance. The 2005 STS was designed to compete with established luxury sedans, offering a spacious and comfortable interior, a choice of potent V6 or V8 engines, and available all-wheel drive. Notable features include an advanced infotainment system, optional navigation, and the innovative Magnetic Ride Control suspension, all contributing to a sophisticated driving experience aimed at buyers seeking a stylish and capable American luxury automobile.

This manual serves as a comprehensive guide to understanding and operating your 2005 Cadillac STS. It covers essential information regarding the vehicle's features and controls, provides guidance on scheduled maintenance and DIY tasks, and outlines important safety considerations and towing procedures. Whether you are the owner seeking to familiarize yourself with your vehicle's capabilities or a technician performing maintenance, this guide offers clear instructions and details to help ensure optimal performance and longevity of your Cadillac STS. The information within is presented in an organized, accessible format for ease of use.