Open Today Sales: 9 AM-8 PM
Mark Christopher Buick GMC carries both new Buick SUVs and hundreds of new GMC vehicles on the same Ontario lot, giving Los Angeles-area shoppers two brands to compare without a second stop. Compact crossovers, three-row family vehicles, and full-size trucks all sit side by side here. Drivers commuting into the city or hauling gear on weekends can walk the lot and cross-shop Buick against GMC before settling on a trim. The 2026 lineup covers a wide range of driving needs in one place.
Riverside commuters looking for a smaller footprint often land on the 2026 Buick Envision, a mid-size SUV built for daily city driving. Families cross-shopping three-row seating tend to compare the 2026 Buick Enclave against the larger GMC Yukon, which adds more cargo room for long trips. Truck buyers hauling trailers or job site equipment usually start with the 2026 GMC Sierra 1500, a half-ton pickup with strong towing capability for its class.
Some shoppers prefer buying a 2026 Buick or GMC outright, while others lean toward leasing to change vehicles more often, and our finance team walks through both paths before paperwork begins. Getting started only takes a few minutes through our online finance application. Trading in an older vehicle can also offset the purchase, and our trade-in valuation tool gives a starting figure before a visit to the lot. Every application gets reviewed individually rather than assigned a generic outcome.
Rancho Cucamonga shoppers working with our team get a dealership that has operated as a family business in Ontario for more than 50 years and carries the California #1 Volume GM Dealer distinction across multiple years. Qualifying maintenance can even come to a customer’s home or office through Mobile Service+ instead of requiring a trip to the lot. The dealership has also helped raise more than $11 million for local charities and organizations across its history. Buyers ready to look closer at a specific Buick or GMC model are welcome to reach out any time.
Yes, Mark Christopher Buick GMC runs a full service center with factory-trained technicians for oil changes, brake service, and tire rotations on both Buick and GMC models, with appointments available online.
The 2026 Buick Enclave offers three-row seating for larger families, along with a cargo area behind the third row that expands further when those seats fold flat for hauling gear.
New Buick and GMC models typically include a touchscreen infotainment display, available driver-assist features, and smartphone connectivity, with specific technology packages varying by trim and model.
The 2026 GMC Terrain comes in multiple trim levels, each adjusting interior features, wheel styles, and available technology packages, so shoppers can match a trim to their budget and preferences.
GMC offers electric options including the Hummer EV Pickup and Hummer EV SUV. Shoppers who want to compare an electric GMC against a Buick or traditional gas-powered model can reach our team through the contact page.
