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Service Your Vehicle with Us We have a full service bay with trained technicians standing by.

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Certified Pre-Owned

Get a pre-owned vehicle that's inspected and warrantied.
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Value Trade-In

Get an online quote from Quality Cadillac for your pre-owned vehicle.
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Welcome to Quality Cadillac

Welcome to Quality Cadillac, your dedicated Cadillac dealership in Alton, IL, serving drivers across the greater St. Louis metro with one of the region's finest luxury automotive experiences. Whether you're shopping for a new Cadillac SUV or sedan, exploring our certified pre-owned inventory, or need expert service on your current Cadillac, our team delivers the premium, no-pressure experience the brand demands. Drivers from St. Louis, Edwardsville, Collinsville, and Granite City all find us worth the drive.

Shop the 2026 Cadillac Lineup

Cadillac is in the middle of one of the most compelling product offensives in luxury automotive history, and Quality Cadillac has the full lineup to prove it. SUV buyers can explore the XT5, the iconic Escalade, the performance-focused Escalade-V, and the all-electric Escalade IQ. Those drawn to Cadillac's expanding EV portfolio will find the stunning LYRIQ, track-capable LYRIQ-V, the new OPTIQ, and the three-row VISTIQ. Sedan enthusiasts can experience the refined CT5 and the high-performance CT5-V. Check our current new vehicle specials for the latest Cadillac incentives and offers.

Certified Pre-Owned & Used Cadillac Vehicles

For buyers who want Cadillac luxury at a pre-owned price point, Quality Cadillac maintains a carefully curated pre-owned inventory spanning a range of models and model years. Our Cadillac Certified Pre-Owned vehicles have cleared a rigorous multi-point inspection and are backed by extended factory warranty coverage, giving you near-new confidence at a pre-owned price. Check our pre-owned specials for current deals across our used inventory.

Luxury Financing to Match the Experience

The Quality Cadillac finance center delivers the same premium experience as our showroom floor. Our F&I specialists work with buyers across all credit profiles to structure competitive loan and lease terms that fit your lifestyle and budget. Apply for financing online before your visit and use our trade-in tool to get a market-based estimate on your current vehicle. Every deal is presented transparently, with no hidden fees and no pressure to move faster than you're comfortable with.

Cadillac-Certified Service & Genuine Parts

Owning a Cadillac means expecting more, and our service center delivers exactly that. Our factory-trained, Cadillac-certified technicians handle everything from routine oil changes, tire service, and brake inspections to complex electrical, drivetrain, and EV system repairs, using genuine Cadillac parts sourced through our on-site parts center. Not sure why you should trust us with your Cadillac? Here's why. Check our current service and parts specials and schedule your appointment online today.

Serving Alton & the Greater St. Louis Metro

Quality Cadillac is proud to serve drivers across southwestern Illinois and the greater St. Louis area from our Alton, IL, location. Whether you're coming in from St. Louis, Edwardsville, Collinsville, or Granite City, our team is ready to match you with the right Cadillac at the right price. Contact us with any questions or explore all the areas we serve and stop by our showroom today.

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1620 Homer Adams Pkwy, Alton, IL, 62002

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Quality Cadillac 38.92027, -90.16714.