Blog / GMC Dealer in Mandan, ND

Diesel Truck Winter Maintenance: A September Prep Guide for GMC Duramax® Owners

GMC Truck Winter Maintenance

If you own a Duramax®-powered GMC Sierra, don’t wait until the first freeze to think about your diesel truck’s winter maintenance. September is the ideal window to assess your truck's condition before cold temperatures make every task harder. Drivers in Mandan, North Dakota know how quickly conditions can shift, and getting ahead of the season now means fewer surprises when it matters most. 

 

Check Your Fuel System for Cold-Weather Readiness 

Diesel fuel behaves differently in cold weather than gasoline does. As temperatures drop, diesel can begin to gel, restricting flow through your fuel lines and filters. One of the most important GMC Sierra Duramax® cold weather tips is to switch to a winter-blend diesel fuel or add a quality anti-gel fuel additive before temperatures dip below freezing. You should also replace your fuel filter if it is overdue, since a clogged filter puts extra strain on the system when the engine is working hardest. 

 

Inspect Your Batteries and Electrical System  

Diesel engines rely on strong battery power to fire up in cold weather because they require higher compression to ignite. A battery that functions adequately in summer may struggle to turn over a Duramax® engine on a January morning. Have your battery load-tested in September while conditions are still manageable. Check the terminals for corrosion, inspect the cables for wear, and confirm that your alternator is charging properly. Many Duramax® trucks use dual batteries, so both units need to be evaluated. 

 

Review Your Coolant and Glow Plugs 

Your cooling system plays a critical role in diesel truck winter maintenance. Verify that your coolant mixture provides adequate freeze protection for the low temperatures common in Mandan, ND. A 50/50 mix of coolant and distilled water is a reliable starting point, but North Dakota winters may call for a richer coolant concentration. While you’re at it, have your glow plugs inspected. These components pre-heat the combustion chambers to help the engine start reliably in cold weather, and a failing glow plug can lead to hard starts or misfires. 

 

Evaluate Your Oil Viscosity  

Engine oil thickens in cold temperatures, which slows lubrication at startup—the most wear-intensive moment for any engine. Check your owner's manual for the recommended cold-weather oil viscosity for your specific Duramax® engine. Switching to a lower-viscosity oil for winter months can help ensure that critical components are protected from the moment you start your truck. This is one of the simplest, but most effective cold-weather tips for your GMC Sierra’s Duramax® engine that you can act on right now. 


Engine Oil Change Service

 

Prepare Your Tires and Brakes  

Traction and stopping power are non-negotiable when snow and ice arrive. Inspect your tire tread depth and sidewalls for any cracking or damage. If you run all-season tires, confirm they’re rated for winter conditions. Examine your brake pads and rotors as well, since cold weather can expose weaknesses that are less noticeable during summer driving. A truck that tows or hauls through winter weather needs a braking system that’s fully up to the task. 

 

Visit Schwan Buick GMC Before the Season Changes  

The best diesel truck winter maintenance plan includes a professional inspection by technicians who know your vehicle. The team at Schwan Buick GMC can help you get your GMC Sierra Duramax® ready for whatever the season brings. 

 

Start September Strong and Drive with Confidence 

Diesel truck winter maintenance does not have to be overwhelming. By working through this checklist in September, Duramax® owners can head into the colder months with confidence. From fuel system care to battery checks and glow plug inspections, each step you take now protects your investment and keeps your GMC Sierra running reliably all winter long. Visit Schwan Buick GMC online to schedule your seasonal service in Mandan, North Dakota today. 

Posted in:

Related Posts

Buick Certified Pre-Owned

Buick Certified Pre-Owned Benefits: What Shoppers in Mandan, ND Should Know

Just because you aren’t buying a brand-new vehicle doesn’t mean you should have to compromise security and confidence. If you're looking for a quality pre-owned SUV but want more peace of mind than a handshake can give you, the Buick Certified Pre-Owned benefits program is worth a close look. Whether you're shopping from Mandan, Bismarck, or anywhere in between in North Dakota, understanding what CPO means for Buick can help you make a smarter, more confident buying decision. What Is the Buick Certified Pre-Owned Program? The Buick Certified Pre-Owned benefits program is designed to give buyers the reliability of a new vehicle purchase with the value of a pre-owned price. To qualify, vehicles must meet strict age and mileage requirements. Then they must pass a 172-point inspection covering everything from paint to brakes. Anything not up to standard must be repaired or replaced. This means every Buick CPO vehicle has been carefully reviewed before it ever reaches the lot. You're not just buying a used car—you're buying one that's been held to a higher standard. CarBravo is GM’s Certified Pre-Owned marketplace where you can browse vehicles and learn more about the program. The Buick CPO Warranty One of the biggest draws of a Certified Pre-Owned Buick is the coverage that comes with it. The Buick CPO Bumper-to-Bumper Limited Warranty covers CPO vehicles less than 10 model years old with less than 100,000 miles. You get 12 months or 12,000-mile coverage with no deductible that includes a long list of components. The BravoBudget Powertrain Limited Warranty covers CPO vehicles between 10 and 15 years old with mileage between 100,000 and 150,000 miles. Its added protections like these that reflect the confidence Buick has in their vehicles’ reliability and quality. Additional Buick Certified Pre-Owned Benefits Worth Knowing But wait, there’s more! CPO Buick vehicles include 24/7 roadside assistance, making it easier to handle unexpected situations no matter where you're driving. Every Buick CPO vehicle also comes with a CARFAX® Vehicle History Report, so you can review the vehicle's background before committing. That kind of transparency matters, especially when you're making a significant purchase. Beyond the warranty itself, Buick Certified Pre-Owned benefits extend to the ownership experience. CPO buyers may have access to special financing rates through GM Financial, which can make monthly payments more manageable compared to standard used vehicle financing. Some offers may also include trial periods for OnStar®, Buick's connected services platform, which provides features like emergency response, turn-by-turn navigation, and vehicle diagnostics. The myBuick mobile app is another perk worth mentioning. CPO owners can use it to access vehicle information, schedule service, and stay connected to their Buick from their smartphone. It's the kind of ownership support that typically comes with a new vehicle purchase—extended to the CPO experience as well. Why Buick CPO Makes Sense for Bismarck and Mandan Shoppers For drivers in the Bismarck and Mandan, ND area, a CPO Buick offers a practical way to get into a refined, well-equipped SUV without the new vehicle price tag. Buick's lineup—including popular models like the Encore GX, Envision, and Enclave—offers a lot of space, technology, and comfort. Choosing a CPO version of one of these models means you're getting those features with added protection built in. At Schwan Buick GMC, the team is ready to help you explore available certified pre-owned inventory and walk you through all the Buick Certified Pre-Owned benefits in detail. Visit to browse current CPO listings and find the right fit for your lifestyle and budget. Explore Buick Certified Pre-Owned at Schwan Buick GMC Shopping for a CPO vehicle is one of the smartest ways to balance quality and value. The Buick certified pre-owned benefits program gives you warranty protection, financing options, ownership tools, and the reliability of a thoroughly inspected vehicle. If you're ready to take the next step, Schwan Buick GMC is here to help. Stop in or visit us to get started today.

Buick Encore-GX

Does Buick Make Hybrid Vehicles? Here's What You Need to Know

Buick has built a strong reputation for refined, comfortable SUVs that blend style with everyday practicality. But if you're looking for utmost efficiency and forward-thinking performance, you may be asking, "Does Buick make hybrid vehicles?" It's one of the most common questions Mandan, North Dakota shoppers research before visiting a dealership, and the answer is worth understanding clearly before you make a decision. Does Buick Make Hybrid Vehicles Right Now? As of the current 2025 and 2026 model years, Buick does not offer a traditional gasoline-electric hybrid vehicle in its U.S. lineup. The brand previously sold hybrid models, but Buick has since shifted its focus toward a fully SUV-based lineup that prioritizes turbocharged engines, technology, and premium comfort. So if you're searching specifically for Buick hybrid cars, you won't find a current dedicated hybrid option on the market today. That said, this doesn't mean Buick is standing still on efficiency or innovation. The brand continues to evolve, and its current SUV lineup still delivers meaningful value for drivers looking for a refined and capable vehicle. What Buick Offers Instead While Buick hybrid cars aren’t part of today's U.S. lineup, the brand's current SUV family is built around thoughtful engineering and the well-rounded, dependable performance the brand is known for. The 2026 lineup includes 4 distinct models—the Envista, Encore GX, Envision, and Enclave—each offering turbocharged powertrains designed with efficiency in mind. The Envista is a crossover SUV with a starting price that makes it accessible, while the Encore GX appeals to shoppers who want a small SUV with a bit more versatility. The Envision steps things up with a compact SUV design and available all-wheel drive, and the Enclave serves families well as a mid-size, 3-row SUV with seating for up to 7 passengers. Each model is available across multiple trim levels, including the athletic Sport Touring line and the premium Avenir line, which brings elevated interior materials and exclusive styling touches. Features That Make Buick Worth Considering Even without a hybrid powertrain, that technology shouldn't be the only factor in your decision. Buick's current lineup brings genuine value through its technology and ownership experience. Owners have access to OnStar® connectivity, the myBuick mobile app, GM Rewards points on eligible purchases, and Buick Certified Service for maintenance and repairs. The Enclave has also earned recognition for safety as an IIHS Top Safety Pick, as well as 5-star safety ratings, which matters to families and daily commuters alike. Buick also offers 0.9% APR financing for well-qualified buyers on select models, giving shoppers in Mandan, North Dakota a compelling reason to explore what's currently on the lot. Buick Doesn’t Make Hybrids—But That Shouldn’t Sway You So, does Buick make hybrid vehicles today? It doesn’t—but the brand still delivers a lineup of polished, technology-forward SUVs worth a closer look. Whether you're drawn to the efficiency-focused Envista or the family-friendly Enclave, there's a Buick model that may fit your needs. Stop by Schwan Buick GMC to explore the current lineup and find the right SUV for your lifestyle.

GMC Canyon vs. Sierra 1500: Which Truck Is Right for You?

Two great trucks, one big decision. If you’ve decided on a GMC truck, you’ll certainly be debating the GMC Canyon vs. Sierra 1500. Both bring the serious capability that Mandan, North Dakota drivers need, and both have plenty to offer when it comes to features, but they serve different needs. We’ll show you where each one shines so you’ll feel confident before stepping onto the lot. The GMC Canyon: Midsize Might Not every driver wants a full-size powerhouse for their everyday drive. The Canyon brings plenty of power with a standard 310-hp TurboMax™ engine that produces Best-in-Class torque at 430 lbs.-ft., enabling an impressive 7,700-lb. towing capacity. It’s a strong option for drivers who want robust power but in a more manageable size. That size difference doesn’t compromise its ruggedness, though. The Canyon’s AT4 and AT4X trims can take on ferocious terrain and any weather you face with features like a 2” lift, Multimatic DSSV® dampers, Off-Road and Baja Modes, and underbody shields and cameras. The AT4X AEV Edition goes even further if you frequently off-road, boasting 17” beadlock-capable Salta wheels and 35” MT tires. The Canyon is easier to maneuver in tight spaces, more comfortable to park in everyday settings, and typically more efficient on fuel for day-to-day use with up to 20 MPG combined. If you're looking at the GMC midsize vs. full size truck question from a practicality standpoint, the Canyon is a winner for those who don't regularly haul heavy loads or tow large trailers, or want substantial off-road prowess. The GMC Sierra 1500: Classic Truck Power and Presence The 2026 GMC Sierra 1500 is GMC's light-duty full-size pickup. While it shares a similar base price with the Canyon, the Sierra 1500 is significantly larger with more towing capacity, and a wider range of trim and powertrain options. From the all-essentials workhorse Pro trim to the more comfortable mid-range SLT and blacked-out Elevation, there’s more style and features to pick from. Like the Canyon, the Sierra 1500 offers AT4 trims and the luxurious Denali, but goes a step further with the lavish Denali Ultimate model featuring standard Super Cruise® hands-free driving tech, a signature Vader Chrome grille, and 16-way heated, ventilated, massaging seats in full-grain leather. It comes standard with the same TurboMax™ engine, but also offers a pair of V8 engines topping out at 420 hp and 460 lbs.-ft. of torque, as well as the Duramax® Turbo-Diesel—the only diesel engine in its class. With a 13,300-lb. towing capacity, the Sierra 1500 is the right choice for drivers who regularly pull a boat, haul construction materials, or need a truck that can do more heavy lifting on a consistent basis. North Dakota roads and work demands often call for that kind of capability. Midsize vs. Full Size Truck: Key Differences to Consider When weighing a GMC midsize vs full size truck, a few key factors tend to drive the decision. Size is the most obvious—the Sierra 1500 is longer, wider, and taller than the Canyon, which affects everything from garage fit to fuel use. Towing and payload are also important considerations, with the Sierra 1500 offering a notable edge for those with serious hauling needs. On the other hand, the Canyon may be a better fit for daily commuting, weekend adventure, and lighter-duty tasks. Drivers in Mandan, ND, who use their truck primarily for personal transportation rather than work may find the Canyon more than sufficient. Budget and trim access also matter. Both trucks offer Denali, AT4, and AT4X variants, so premium features are available at either size. Explore Both Models at Schwan Buick GMC The decision comes down to how you plan to use your truck. If you need a do-it-all workhorse with maximum towing and payload, the Sierra 1500 is the clear answer. If you want a capable, feature-rich truck for everyday driving with occasional light hauling, the Canyon delivers real value and a more approachable size.  Both the GMC Canyon and GMC Sierra 1500 are available at Schwan Buick GMC, serving drivers throughout Mandan, North Dakota. Stop by or visit (https://www.schwanbuickgmc.com/) to browse current inventory, explore trim options, and find the truck that fits your life best.