2025 Ram 3500 vs 2026 GMC Sierra 3500HD

$46,570 · Truck

$47,900 · Truck

Comparison Overview

The 2025 Ram 3500 bursts onto the heavy-duty scene emphasizing raw power, boasting 405 horsepower from its standard engine, providing an immediate surge of capability over the 2026 GMC Sierra 3500HD’s 401 horsepower offering. While the Ram’s 429 lb-ft of torque is respectable, the GMC counters strongly with a superior 464 lb-ft of torque, hinting at superior pulling grunt, complemented by a more refined 10-speed automatic transmission versus the Ram's 8-speed unit. The Sierra 3500HD is the bigger brute, measuring 236.3 inches long and 81.9 inches wide, dwarfing the Ram’s 232.0-inch length and 79.4-inch width, suggesting a more imposing on-road presence. Despite the size difference, the Ram starts at a slightly lower $46,570 MSRP compared to the GMC's $47,900, making the comparison tight between brute strength, technological refinement, and initial cost.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 Ram 3500

The Ram 3500 wins for commuters due to its slightly lower $46,570 MSRP and marginally smaller overall footprint.

👨‍👩‍👧‍👦 Best for Families

2026 GMC Sierra 3500HD

The 2026 Sierra 3500HD is the clear choice for families needing maximum space, as it is taller (80.9 inches) and wider (81.9 inches) than the competition.

🏎️ Best for Enthusiasts

2026 GMC Sierra 3500HD

Enthusiasts will favor the Sierra's greater torque output of 464 lb-ft and its smoother 10-speed automatic transmission.

💰 Best Value

2025 Ram 3500

Car1 offers a slight advantage in value because it starts at $1,330 less than car2 while still providing more horsepower (405 hp vs 401 hp).

Choose the Ram 3500 if...

You prioritize maximizing horsepower with 405 hp from the base engine.
You are aiming for the lowest possible starting price at $46,570.
You prefer a slightly more compact exterior, measuring 232.0 inches in length for easier maneuvering.

Choose the GMC Sierra 3500HD if...

You need the highest peak torque rating, achieving 464 lb-ft.
You value a more sophisticated gear management system provided by the 10-speed automatic transmission.
You require the most substantial physical presence, evident in its 80.9-inch height.

Key Dimensions

Dimension	Ram 3500	GMC Sierra 3500HD
Length	232.0"	236.3"
Width	79.4"	81.9"
Height	77.8"	80.9"
Wheelbase	140.0"	142.0"

Features Comparison

Safety

Feature	Ram	GMC
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Front Ventilated Disc Brakes	✓	✓
Rear Solid Disc Brakes	✓	—
Brake Preparation System	✓	—
Brake Assist	✓	—
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Front Fog Lights	✓	—
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Front Center 3-Point Seatbelt	✓	✓
Engine Immobilizer	✓	✓
Lane Departure Warning	—	✓
Rear Ventilated Disc Brakes	—	✓
Integrated Turn Signal Mirrors	—	✓

Engine

Feature	Ram	GMC
Base Engine Displacement	6.4 L	6.6 L
Number of Cylinders	V8	V8
Base Engine Type	gas	gas
Horsepower	405 hp @ 5600 rpm	401 hp @ 5200 rpm
Torque	429 lb-ft @ 4000 rpm	464 lb-ft @ 4000 rpm
Number of Valves	16	16
Camshaft Type	Overhead valves (OHV)	Overhead valves (OHV)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	—	✓

Drive Train

Feature	Ram	GMC
Transmission Type	8-speed shiftable automatic	10-speed shiftable automatic
Drivetrain Type	rear wheel drive	rear wheel drive
Rear Differential Type	Limited Slip	Locking

Fuel

Feature	Ram	GMC
Fuel Type	regular unleaded	regular unleaded
EPA Driving Range (City/Highway)	0/0 mi.	0/0 mi.
Fuel Tank Capacity	32.0 gal.	36.0 gal.

Comfort & Convenience

Feature	Ram	GMC
Push Button Start	✓	✓
Tilt Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	—
Cruise Controls on Steering Wheel	✓	—
Power Steering	✓	✓
Rear View Camera	✓	✓
Adaptive Cruise Control	✓	—
Front Cupholders	✓	✓
Front Door Pockets	✓	✓
Single Zone Climate Control	✓	✓
Interior Air Filtration	✓	—
Passenger Vanity Mirror	✓	—
Steering Wheel Controls	—	✓
Cruise Control	—	✓
Turn Signal Indicators in Mirrors	—	✓

In Car Entertainment

Feature	Ram	GMC
Infotainment Display	8.4 in	7.0 in
AM/FM Stereo	✓	✓
Speaker System	4	2
Android Auto (Wired)	✓	✓
Apple CarPlay (Wired)	✓	✓
USB Port	✓	✓
Auxiliary Audio Input	✓	—
USB Port with External Media Control	✓	✓
Satellite Radio	✓	—
Speed Sensitive Volume Control	—	✓

Power Feature

Feature	Ram	GMC
Heated Mirrors	✓	✓
One-Touch Power Windows	—	2
Power Door Locks	—	✓

Frontseats

Feature	Ram	GMC
Front Head Room	39.8 in.	43.1 in.
Front Leg Room	40.9 in.	44.5 in.
Front Shoulder Room	65.9 in.	66.1 in.
Front Hip Room	62.9 in.	60.9 in.
Seat Material: Vinyl	✓	✓
Front Seat Type: 40-20-40 Split Bench	✓	✓
Driver Seat Manual Adjustments	4-way	4-way
Passenger Seat Manual Adjustments	4-way	4-way

Tires and Wheels

Feature	Ram	GMC
Wheel Finish	Painted Steel	Painted Steel
Wheel Size	18 x 8.0 in	—
Tire Type	All Season	All Terrain
Tire Size	LT275/70R18	LT275/70R18
Spare Tire Type	Full Size Non-Matching	Full Size Matching
Spare Tire Location	Underbody Mounted	Underbody Mounted
Wheel Diameter	—	18 in

Suspension

Feature	Ram	GMC
Stabilizer Bar	✓	✓
Front Suspension Type	—	Independent

Warranty

Feature	Ram	GMC
Basic Warranty	3 yr./ 36000 mi.	3 yr./ 36000 mi.
Drivetrain Warranty	5 yr./ 60000 mi.	5 yr./ 100000 mi.
Corrosion/Rust Warranty	5 yr./ unlimited mi.	6 yr./ 100000 mi.
Roadside Assistance	5 yr./ 60000 mi.	5 yr./ 60000 mi.
Complimentary Scheduled Maintenance	—	1 yr./ unlimited mi.

Frequently Asked Questions

Common questions about comparing the 2025 Ram 3500 and 2026 GMC Sierra 3500HD.

Which truck offers better outright performance based on the base specs?

The 2025 Ram 3500 delivers more peak horsepower at 405 hp compared to the Sierra's 401 hp. However, the 2026 GMC Sierra 3500HD generates significantly more pulling force with 464 lb-ft of torque, suggesting better low-end work capability.

How do the size differences between the 2025 Ram 3500 and 2026 GMC Sierra 3500HD impact usability?

The Sierra 3500HD is substantially larger across all dimensions, standing 80.9 inches tall and 81.9 inches wide, versus the Ram's 77.8 inches in height and 79.4 inches in width. This means the GMC will require more garage clearance and might be tougher to navigate in tight urban settings.

Is the price difference between the two heavy-duty trucks significant?

Yes, the Ram 3500 holds a distinct upfront advantage with an MSRP of $46,570, which is $1,330 less than the Sierra 3500HD's starting price of $47,900. Both utilize regular unleaded fuel for their base engines.

Which transmission is technologically superior for towing efficiency?

The 2026 GMC Sierra 3500HD utilizes a 10-speed shiftable automatic, offering more gear ratios for optimized efficiency and smoother power delivery than the 8-speed automatic found in the 2025 Ram 3500.

Are both heavy-duty trucks configured similarly for power delivery?

Both vehicles listed are standard Rear Wheel Drive models utilizing shiftable automatic transmissions. Crucially, both base engines run on regular unleaded fuel, which can be a cost-saving factor compared to diesel options.