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Are you torn between maximum towing capability and daily driving efficiency? If you are looking at the top-tier truck market for 2025, you are likely comparing the GMC Denali Ultimate trims. But the real question is under the hood: Do you need the "Big Diesel" or the "Small Diesel"?

We are breaking down the 2025 GMC Sierra 2500 Denali Ultimate with the 6.6L Duramax against the 2025 Sierra 1500 Denali Ultimate with the 3.0L Duramax. Both are luxurious, loaded with tech, and feature painted-to-match body accents for 2025, but they serve very different purposes.

"What truck should I buy to tow my camper?" It is the question I get asked most often.

While there are plenty of capable trucks on the market, if you are looking to take your camper off the beaten path—down state forest access roads, through gravel, mud, and potholes—you need a specific kind of setup. You need power, but you also need maneuverability.

In this post, I’m breaking down my personal rig: the 2025 GMC Denali Ultimate 3500HD. I’ll explain why I chose the single rear wheel configuration, the modifications I made for off-roading, and the…

If you have been shopping for a GMC pickup truck, particularly models from 2019 onwards, you’ve likely seen the "X31 Off-Road" badge on the fenders. But what does that code actually mean for the truck's capability?

Many customers ask this exact question. Is it just stickers and tires, or is there real mechanical substance behind the badge?

So, you've invested in the formidable 2024 GMC Sierra 2500 AT4X Diesel – a truck that already commands attention. But what if you could elevate its presence, enhance its performance, and truly make it your own without breaking the bank? We're talking about a few thousand dollars to transform your already incredible machine into an absolute showstopper.

If you think you’ve seen a GMC Denali Ultimate, think again. We get a lot of incredible trucks through our shop, but this 2024 GMC Sierra 2500 Denali Ultimate Diesel is, without a doubt, the "sickest" and "baddest" one we’ve gotten in yet.

While the standard Denali Ultimate is already the pinnacle of truck luxury, we took this one to the next level with a custom stance and a serious blacked-out treatment that sets it apart from anything else on the road.

When it comes to heavy-duty trucks, paper specs are one thing, but real-world performance is everything. Recently, I had the chance to take a 2024 Ford F-350 Platinum on a serious road test.

This wasn't a quick drive around the block. I took this truck on a 1,200-mile round trip from Pennsylvania to South Carolina to pick up an 8,500-lb camper. The route included long highway stretches, steep mountain grades, and even some gravel backroads in the George Washington National Forest.

Finding the exact used vehicle a customer wants can be a challenge, especially when they have a very particular list of criteria. At Mark Martin Motors, we thrive on that challenge.

Recently, I was tasked with finding a specific SUV for a customer: a 2022 or newer Jeep Wagoneer. It had to be white, and it absolutely had to be under $56,000 out-the-door.

It’s no secret that heavy-duty trucks are in high demand right now. But some trims are nearly impossible to find. We’re talking about the elusive "unicorns" of the truck world.

Today, we are thrilled to showcase one of the hardest trucks to get your hands on right now: a 2024 GMC Sierra 3500 Denali Ultimate Dually (DRW).

Getting a standard Denali Ultimate is tough enough, but finding the Dually variant is a real challenge. These are the trucks demanded by guys towing heavy loads—big campers, horse trailers, or race haulers. They want that max towing capability paired…

If you are in the market for a heavy-duty truck that combines massive power, factory-backed off-road capability, and a sleek, custom look without touching an aftermarket catalog, you need to see this.

We recently got our hands on an incredibly hard-to-find configuration: a 2024 Ford F-250 Super Duty Lariat Crew Cab. But this isn't just any Lariat. This truck is equipped with the holy trinity of Super Duty options: The High Output Power Stroke Diesel, the Tremor Off-Road Package, and the Black Appearance Package.

When you’re looking at heavy-duty trucks, specifically the top-tier 2024 GMC Sierra Denali Ultimate, it can be incredibly difficult to tell the difference between a 2500 HD and a 3500 HD just by looking at them.

There is a ton of conflicting information out there regarding weights, specs, and capabilities. Are the brakes better on the one-ton? Does the 3500 have a bigger engine?

We have both trucks side-by-side to break down exactly what is the same, what is different mechanically, and most importantly, why those differences matter for your safety and legal liability when towing.