2026 GMC Sierra 3500 review
GMC Sierra 3500 highlights
Customer rating
(not yet rated)
Pros
- 6.6L gas V8 and 6.6L turbodiesel options available
- Impressive technology integration
- Great upscale interior and comfortable ride
Cons
- Large size makes parking a bit of a challenge
- Definitely not mpg-focused
- Forward visibility limited by large hood
Mileage (EPA estimate)
(data not available)
Pricing for current inventory
(no current inventory)
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All GMC Sierra 3500 years
What is new for the 2026 GMC Sierra 3500?
- Sierra 3500 trims have been upgraded with Running Boards as standard equipment this year.
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Ratings & reliability
Customer ratings
The 2026 GMC Sierra 3500 is not yet rated. Help future customers learn about a car you've owned and write a review.
RepairPal gave the GMC Sierra 3500 an overall reliability rating of 3 out of 5 stars, which RepairPal describes as Average. This rating ranks GMC Sierra 3500 14th out of 19 among Fullsize Trucks.
RepairPal reports that the average total annual cost for repairs and maintenance on a GMC Sierra 3500 is $1061, compared to an average of $818 for Fullsize Trucks and $591 for all the vehicles RepairPal considered in its dataset.
According to RepairPal, GMC Sierra 3500 owners bring their vehicles into a repair shop for unscheduled repairs an average of 0.8 times per year, compared to an average of 0.9 times for Fullsize Trucks and 1.3 times for all the vehicles RepairPal considered in its dataset.
RepairPal reported that the probability of a repair being a severe or major issue is 25% for the GMC Sierra 3500, compared to an average of 22% for Fullsize Trucks and 14% for all the vehicles RepairPal considered in its dataset.
GMC Sierra 3500 features and specs
Curious how GMC Sierra 3500 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities
Pro 2D Regular Cab 2WD
Standard Features
- Side Airbags
- Cruise Control
- Traction Control
- Overhead Airbags
- Air Conditioning
- ABS Brakes
- Rear View Camera
- Power Locks
- Power Windows
- Vinyl Seats
- Power Mirrors
- Tow Hitch
- Automatic Transmission
- Android Auto
- Apple CarPlay
- Auxiliary Audio Input
- Bluetooth Technology
- AM/FM Stereo
- Automated Cruise Control
- Cloth Seats
- Rear Defroster
- Power Seat(s)
- Parking Sensors
- Lane Departure Warning
- Rear View Camera
- Long Bed
- Dual Rear Wheels
- Gooseneck Tow Hitch
- Fifth Wheel Tow Hitch
- Running Boards
- Bed Liner
- Bed Cover
- Alloy Wheels
- Satellite Radio Ready
- AM/FM Stereo
Drive Wheels
Rear Wheel Drive (2WD)
Engine size
6.6L
Horsepower
401
Torque (ft-lbs)
464
Engine type
Gas
Fuel capacity
36
Wheelbase
141.55"
Overall length
236.3"
Width
81.75"
Height
80.94"
Leg room
F 44.53"
Head room
F 43.11"
Front tires
LT275/70R18
Rear tires
LT275/70R18
Seating capacity
3
Max towing capacity
1450/20000 lbs.
Transmission
Automatic
2026 GMC Sierra 3500 FAQ
- The 2026 GMC Sierra 3500 has a maximum towing capacity of 20000 pounds, when properly equipped. Various factors may impact towing capacity, including weight of passengers, cargo, and options/accessories.
- The GMC Sierra 3500 received a rating of 3 out of 5 stars from RepairPal, which RepairPal describes as Average. This rating ranks the GMC Sierra 3500 as 14 out of 19 among Fullsize Truck
- Here is what's new for the 2026 GMC Sierra 3500:
- Running Boards
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