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At Mark Allen Buick GMC in Collinsville, OK, we're excited to showcase the impressive 2025 GMC Sierra 3500 HD. 

Deciding whether to buy a new or used vehicle is a common dilemma for Collinsville car shoppers. Both options have their merits. New cars offer the latest features, better fuel efficiency, and bumper-to-bumper warranties. However, they also come with a higher price tag. At Mark Allen Buick GMC in Collinsville, you can browse our extensive new inventory to see the latest models we have in stock.

The 2025 GMC HUMMER EV SUV boasts an impressive array of utility features that make it incredibly capable both on and off the road. 

The 2025 GMC Savana 3500 Cutaway, available at Mark Allen Buick GMC in Collinsville, delivers a commanding presence on the road with its imposing grille, strong lines, and purposeful stance. Powered by your choice of a 4.3-liter V6 or muscular 6.6-liter V8 engine, paired with a smooth-shifting 8-speed automatic transmission, the Savana 3500 Cutaway easily tackles tough jobs. The sturdy rear-wheel drive (RWD) and versatile cutaway configuration allow you to upfit this workhorse for your needs.

Regular vehicle maintenance is essential to keep your car running smoothly and reliably in Collinsville, OK. When it comes to servicing your vehicle, choosing the right service center can make all the difference. At Mark Allen Buick GMC, our service center is dedicated to providing top-notch care for your vehicle, ensuring it stays in excellent condition for years.

Drivers in Collinsville and the greater Tulsa area looking for a high-quality pre-owned vehicle will find an impressive selection at Mark Allen Buick GMC. Our extensive pre-owned vehicle inventory includes popular models from Buick, GMC, and other top makes, so you can find the perfect car, truck, or SUV to fit your needs and budget.

When it comes time to get a new vehicle in the Collinsville, OK area, one of the biggest decisions is whether to finance or lease. 

Looking for a powerful, capable work truck in the Tulsa area? The 2025 GMC Sierra 3500 HD Chassis Cab is ready to take on your toughest jobs. 

Auto enthusiasts in Collinsville have much to look forward to with Buick's 2025 model year. The beloved American automaker is rolling out some exciting updates and refreshes to its popular vehicle lineup. Mark Allen Buick GMC, conveniently located in Collinsville, is your premier destination to check out everything Buick has in store for 2025.

Mark Allen Buick GMC in Collinsville is excited to showcase the highly anticipated 2025 GMC Sierra EV and its impressive capability features. This electric truck, available in Denali Extended Range and Denali Max Range trims, delivers uncompromising performance for Oklahoma drivers. With up to 760 horsepower and 440 miles of range in the Denali Max Range, the Sierra EV sets a new standard for electric pickups in the Tulsa market.