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Welcome to Mark Christopher Auto Center
Ontario's #1 Volume GM Dealer
Welcome to Mark Christopher Auto Center, California's #1 volume GM dealer and the Inland Empire's most trusted source for new Buick, Cadillac, Chevrolet, GMC vehicles. Located at 2131 Convention Center Way in Ontario, CA, we have been family-owned and operated for over 50 years, serving drivers from Rancho Cucamonga, Riverside, Fontana, Los Angeles, Anaheim, and throughout Southern California. Our commitment to competitive pricing, genuine customer service, and deep community investment has made Mark Christopher a household name across San Bernardino, Riverside, Orange, and Los Angeles County.
Shop New Buick, Cadillac, Chevrolet, GMC Vehicles in Ontario, CA
With one of the largest GM inventories in the state, Mark Christopher Auto Center gives Southern California drivers access to the full 2026 Buick, Cadillac, Chevrolet, GMC lineup under one roof. Whether you're configuring a Chevrolet Silverado 1500, cross-shopping the Traverse and Tahoe for family duty, or exploring the electric lineup with the Chevrolet Equinox EV or Blazer EV, our inventory has the trim, color, and package you're looking for. Browse our full new inventory and check out our must-see deals for current incentives.
Quality Pre-Owned Vehicles for Every Budget
Mark Christopher maintains a carefully inspected pre-owned inventory spanning a wide range of makes, models, and price points. Every used vehicle on our lot has been rigorously inspected and reconditioned before hitting the showroom floor. Budget-conscious shoppers can filter by price with our used vehicles under $25,000 collection, or check our latest pre-owned specials for additional savings.
Auto Financing for All Credit Profiles
Our finance center is staffed by experienced F&I specialists who work with a broad lender network to structure competitive loan and lease terms for buyers at every credit tier. Apply for financing online before your visit, or use our trade-in tool to get a market-based estimate on your current vehicle. Businesses across the Inland Empire also rely on Mark Christopher for commercial fleet financing on Buick, Cadillac, Chevrolet, GMC work trucks and cargo vans.
Expert Service & Genuine GM Parts
Our relationship with customers extends well beyond the sale. Mark Christopher's factory-trained, GM-certified technicians handle everything from routine oil changes and tire rotations to complex diagnostics, transmission service, and collision repair through our dedicated collision and body shop. Need work done on your schedule? Our mobile service brings certified technicians directly to you. Genuine GM parts are stocked on-site and available to order online. Check our current service and parts specials and schedule your appointment online today.
Proudly Serving Southern California for Over 50 Years
Mark Christopher Auto Center has contributed more than $11 million to local charities, nonprofits, and community organizations across the Inland Empire, because we believe a great dealership is measured by more than the vehicles it sells. Whether you're visiting from Pomona, Upland, San Bernardino, Moreno Valley, or anywhere across Southern California, our team is ready to deliver a completely personalized shopping experience. Contact us or stop by our Ontario showroom and experience the Mark Christopher difference today.
Our Reviews
Took our truck there after the upper A arm broke. Truck sat outside for 3 1/2 months in the hot elements during the summer waiting for parts to be re-engineered. The service updates were terrible. Everything seemed to fall on deaf ears. Being that the parts were an issue to obtain, (GM's fault,) you would think they would offer some kind of loaner car. The customer service was so terrible< we had to contact GM directly. We were supposed to receive our truck back looking like a ("polished penny") and when we received it back, it was an oxidized mess. I'm not one to complain. This dealership did not give one iota of ---- about us or our vehicle. Some people think nothing of their automobiles. Us, we treat them as show cars... We have always been a GM family, and my in-laws are retired from GM. We won't let this detour us from GM. Our choice of our dealership will change though. Thank you Chris Leggio for the wonderful customer service and experience.
Best dealer great service all the time that's why I keep going back this is our fourth car we gat from Mark Chrispher
Awesome service, thought the car had a major issue but was still diagnosed and fixed within a day of it happening. Issue happened Tuesday, made an appointment that night, dropped car off on Wednesday and had my car back Thursday.
Our sales rep Anthony was amazing. Great personality, great product knowledge. He found me something better than what I originally wanted and stayed close to the budget. He paid attention to the whole family, even the 4 year old during the sale. Great guy!!
Mark christopher is a Great dealer great costumer service fast to answer any question and needs thanks again
Great Great experience- quick and fast service I strongly recommend Great experience- quick and fast service
Everyone I dealt with here were great. These guys are straightforward and professional.
Beware of this dealership service Dept. There was damage to my Cadillac Escalade after being in their possession for a week. Delearship failed to assume responsibility rather provided me with photos of a different vehicle with a different ID. Management refuses to accept responsibility. My vehicle was driven without my consent for over 100 miles. Documents given upon delivery state technician drove my car 35 miles. Service advisor had requested my permission to drive my vehicle home “to get it to act up” advisor denied any permission. This shop violates the trust consumers provide with their vehicles.
Thorough and complete Asked to check on temperature difference on car and weather app. Nobu gave detailed information on what was done to address problem.
Easy to work with. Everyone helped if something was unknown with vehicle. I appreciated everyone involved.
Great dealer customer service and prices thanks again will definitely purchase another vehicle here in the future
Devin was professional and made our visit to the dealership an easy outing. He answered all questions we had
Nobu and service staff were helpful. No loaner car or shuttle was a negative. Diagnostic was expensive.
⭐⭐⭐⭐⭐ We had such a wonderful experience. Our salesman, Greg H, was extremely attentive, professional, and genuinely went above and beyond to make sure we were taken care of. He took the time to listen to our needs, answered all our questions, and worked with us every step of the way. We never felt pressured or rushed, which made the entire experience even better. His patience, honesty, and excellent customer service truly stood out. It’s refreshing to work with someone who genuinely cares about their customers and making sure they leave happy. We couldn’t be more pleased with our experience and would highly recommend him to anyone looking for exceptional service. Thank you for making the process so smooth and enjoyable!
Chelsea Jose is one of the service writers that I ask for when I take my car in for service. She is excellent, keeps on top of the service being performed and keeps me in the loop. A wonderful person!