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When school lets out, families across Oklahoma start thinking about where to go on vacation. 

The 2026 GMC HUMMER EV Pickup transforms the truck interior with advanced features and thoughtful design. At the center sits a 13.4-inch diagonal infotainment system with Google built-in compatibility, providing navigation and connected apps. The Bose surround sound system delivers exceptional audio through 14 speakers with Centerpoint technology, while the Super Cruise steering wheel enables hands-free driving on compatible roads.

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

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

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. 

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.

The 2024 GMC Sierra 3500 Denali HD comes standard with advanced driver assist features like HD Surround Vision to give you a clear overhead view around the truck. 

The 2024 Buick Encore GX is a subcompact SUV with impressive utility and capability. 

The 2024 GMC HUMMER electric vehicle (EV) Pickup comes standard with the Infinity Roof featuring removable transparent Sky Panels, allowing you to enjoy open-air driving.