2018 GMC Sierra 3500

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2018 GMC Sierra 3500
2018 GMC Sierra 3500

Key specs

Base trim shown

Pickup Truck

Body style


Seating capacity

229.5” x 76.85”


Rear-wheel drive



The good:

  • All Terrain model
  • Two bed-length choices for crew cab
  • Direct-injection, cylinder-deactivating engines
  • Quiet interior

The bad:

  • No long-bed double-cab model for 1500
  • No diesel-engine option on 1500
  • Steering wheel not centered on driver's seat

4 trims

Starting msrp listed lowest to highest price

Wondering which trim is right for you?

Our 2018 GMC Sierra 3500 trim comparison will help you decide.

See also: Find the best Pickup Trucks for 2023

Notable features

  • 7-inch touchscreen radio, backup camera now standard
  • Heavy-duty Denali models get new grille
  • 12,500-pound maximum towing capacity (Sierra 1500)
  • Apple CarPlay, Android Auto connectivity standard
  • OnStar with 4G LTE and Wi-Fi hot spot available
  • Forward collision warning available

2018 GMC Sierra 3500 review: Our expert's take

What it is: The Sierra 1500 is GMC's entrant in the half-ton, full-size pickup truck segment. It’s a corporate cousin of the Chevrolet Silverado 1500, sharing the same platform, engines, body styles and major mechanical features. The Sierra has different styling, particularly in front, and GMC positions its vehicles as more upscale than Chevrolet’s. Competitors include the Ford F-150, Ram 1500 and Toyota Tundra.

Three cab styles — regular, extended and crew — and three engines are available for the Sierra 1500. All the engines are gas-powered: a 4.3-liter V-6, and 5.3-liter and 6.2-liter V-8s. As with the Silverado, the Sierra is available in 2500HD and 3500HD heavy-duty versions that offer a turbo-diesel engine and higher payloads and towing capacities.

The base truck gains a standard 7-inch touchscreen radio and a backup camera. The tire pressure monitor now includes a tire-fill alert that monitors how much air is pumped into a tire.

Sierra 2500HD and 3500HD
The GMC Sierra 2500HD and 3500HD heavy-duty pickup trucks are the true workhorses of the Sierra lineup and are designed for hauling heavy payloads and towing large trailers.

Changes for 2018 include a standard backup camera on all models with a cargo bed, a standard 7-inch touchscreen radio for the base model and a new grille for the Denali version.

What’s Special

  • Standard 360-horsepower, 6.0-liter V-8
  • Available 445-hp, turbo-diesel 6.6-liter V-8 with 910 pounds-feet of torque
  • Maximum towing capacity of 20,000 pounds with a conventional trailer hitch (3500HD with dual rear wheels)
  • Maximum fifth-wheel or gooseneck towing capacity of 23,300 pounds (3500HD with dual rear wheels)

Consumer reviews

Rating breakdown (out of 5):
  • Comfort 4.7
  • Interior design 4.9
  • Performance 4.4
  • Value for the money 3.7
  • Exterior styling 5.0
  • Reliability 4.2

Most recent consumer reviews



It’s beautiful to look at but is nowhere near “Professional Grade”. This is a 3500hd which should be able to carry loads, it didn’t last a year. The engine is broke and has been in the shop for 3months.


I have had to of these before and I drive the xxxx

Just what I was looking for and the price was right. The color was the same as the truck I traded in. We have purchased a bumper pull camper and now mountain passes will feel like flat roads!!


Capable truck with the right options

Drove well and plenty of power, the SLT is perfect for us with the 40-20-40 front seat and without the extras that we don't need that are on the Denali.

See all 7 consumer reviews


New car and Certified Pre-Owned programs by GMC
New car program benefits
36 months/36,000 miles
36 months/36,000 miles
60 months/60,000 miles
24 months/24,000 miles
Roadside assistance
60 months/60,000 miles
Certified Pre-Owned program benefits
Maximum age/mileage
5 model years or newer/up to 75,000 miles
Basic warranty terms
12 months/12,000 miles bumper-to-bumper original warranty, then may continue to 6 years/100,000 miles limited (depending on variables)
6 years/100,000 miles
Dealer certification required
172-point inspection
Roadside assistance
View all cpo program details

Have questions about warranties or CPO programs?

Compare the competitors

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