
The RAM 3500 is the heavy-duty standard for contractors, ranchers, and anyone who needs a truck that earns its keep. At North Park CDJR on US-90 in Castroville, TX, we stock the San Antonio RAM 3500 with daily updated inventory, no-haggle posted pricing, and a sales team that knows this truck inside and out. If you need maximum towing, serious payload, or a work-ready cab that holds up on real Texas roads, you are in the right place.
The RAM 3500 is built around one principle: do the work without making excuses. With two engine options, multiple cab configurations, and best-in-class towing capacity, this is a truck sized for the demands of South Texas ranching, construction, and commercial hauling. It also comes with enough interior technology and comfort to make the drive to and from the job site feel like less of a chore.
Two powertrains anchor the lineup. The standard 6.4L HEMI V8 produces 405 horsepower and 429 lb-ft of torque, handling daily workloads without drama. The available 6.7L Cummins Turbo Diesel steps it up with 430 horsepower and 1,075 lb-ft of torque, and maximum towing capacity up to 37,090 pounds when properly equipped.
For anyone hauling equipment trailers, livestock, or heavy loads west of San Antonio, that number matters. The available digital rearview mirror and Trailer Reverse Steering Control make managing a loaded trailer considerably less stressful, giving drivers better visibility and more precise control when backing into tight spots on a job site or at the ranch.

The RAM 3500 runs five trim levels, each built around a specific type of buyer. North Park CDJR carries inventory across the lineup so buyers can compare configurations in person before committing. Here is what each trim brings:
North Park CDJR keeps RAM 3500 inventory updated daily, so the prices and configurations posted on our website reflect what is on the lot in Castroville. Cab configuration, bed length, drivetrain, and trim all affect the final price, and our team will walk you through every variable before you reach the finance desk. Call ahead to confirm vehicle availability on a specific build, or browse online and come out to see it in person.
Every RAM 3500 we sell comes backed by the full RAM manufacturer warranty, and our Mopar-certified service department handles everything after delivery. Oil changes, diesel service, trailer brake controller calibration, Mopar parts: it all happens right here on US-90 without sending you into San Antonio traffic to get it done.
The RAM 3500 is the top of the heavy-duty lineup, but it is not the only RAM worth considering, depending on your workload. Here is what else we carry:

Buying a San Antonio RAM 3500 from North Park CDJR means buying from a Castroville team that uses these roads and understands what heavy-duty work looks like out here. Backed by Kahlig Auto Group’s 50-plus years of dealership experience, we bring institutional knowledge and a no-pressure process to every truck sale. Here is what that looks like in practice:
Our sales team knows the RAM 3500 by trim, engine, and configuration. They can tell you the real difference between the HEMI and the Cummins for your specific haul, walk you through cab and bed options, and point you toward the right build without overloading you with options you do not need. No rehearsed pitch, no pressure, just straight answers from people who know the truck and know this area.
North Park CDJR’s service department is Mopar-certified and stocked with genuine RAM parts, so your truck gets serviced the right way without leaving Castroville. From diesel maintenance to trailer brake system checks to warranty work, our technicians are specifically trained on the RAM 3500. Buying local means your service relationship stays local, and that matters when your truck is how you make a living.
Every RAM 3500 on our lot carries a posted no-haggle price, meaning the number you see is the number at the desk with no addenda buried in the paperwork. Our finance team works with multiple lenders to build competitive rates across a range of credit profiles, and we walk through every document before you sign. Confirm vehicle availability and posted pricing online anytime, or call us directly, and a real person will pick up.

The best way to understand what the San Antonio RAM 3500 can do is to put it on a road that tests it. Scheduling a test drive at North Park CDJR takes two minutes online, or call our sales team directly at 830-468-9298, and we will have a truck ready. Come out, feel the powertrain under load, sit in the cab configuration you are considering, and work through the features before you commit.
The RAM 3500 is available with the 6.7L Cummins Turbo Diesel engine, producing 430 horsepower and 1,075 lb-ft of torque, with a maximum towing capacity of up to 37,090 pounds when properly equipped. Buyers near San Antonio can confirm diesel inventory availability and compare it against the standard 6.4L HEMI V8 in person at the Castroville lot on US-90.
A San Antonio RAM 3500 test drive can be scheduled in two minutes online or by calling 830-468-9298 to set it up directly with the sales team at North Park CDJR in Castroville. The lot carries multiple cab configurations and trim levels, so buyers can drive the specific build they are considering before committing.
The RAM 3500 is available in five trims, from the work-ready Tradesman through the Lone Star, Laramie, Limited Longhorn, and Limited, each adding progressively more comfort, technology, and towing features. North Park CDJR carries inventory across the lineup at 1950 US-90 in Castroville, with posted no-haggle pricing on every configuration.